In an attempt to get to the bottom of the question regarding the day-year principle, I am going to quote the following:

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PAGE 54. PROPHETIC DATES.--AN IMPORTANT PRINCIPLE IN PROPHETIC INTERPRETATION IN CONNECTION WITH TIME PROPHECIES IS THE YEAR-DAY PRINCIPLE, UNDER WHICH A DAY OF PROPHETIC TIME IS COUNTED AS A CALENDAR YEAR OF HISTORIC TIME. BEFORE THE ISRAELITES ENTERED THE LAND OF CANAAN THEY SENT TWELVE SPIES AHEAD TO INVESTIGATE. THE SPIES WERE GONE FORTY DAYS, AND UPON THEIR RETURN THE HEBREWS, FRIGHTENED AT THEIR REPORT, REFUSED TO GO UP AND OCCUPY THE PROMISED LAND. THE RESULT WAS A SENTENCE THE LORD PASSED UPON THEM: "AFTER THE NUMBER OF THE DAYS IN WHICH YE SEARCHED THE LAND, EVEN FORTY DAYS, EACH DAY FOR A YEAR, SHALL YE BEAR YOUR INIQUITIES, EVEN FORTY YEARS." NUMBERS 14:34. A SIMILAR METHOD OF COMPUTING FUTURE TIME IS INDICATED THROUGH THE PROPHET EZEKIEL. FORTY YEARS OF PUNISHMENT FOR INIQUITIES AWAITED THE KINGDOM OF JUDAH. THE LORD SAID THROUGH THE PROPHET: "LIE AGAIN ON THY RIGHT SIDE, AND THOU SHALT BEAR THE INIQUITY OF THE HOUSE OF JUDAH FORTY DAYS: I HAVE APPOINTED THEE EACH DAY FOR A YEAR." EZEKIEL 4:6. THIS YEAR-DAY PRINCIPLE HAS AN IMPORTANT APPLICATION IN INTERPRETING THE TIME OF THE PROPHECY OF THE "TWO THOUSAND AND THREE HUNDRED EVENINGS AND MORNINGS" (DANIEL 8:14, R.V.) AND THE 1260-DAY PERIOD, VARIOUSLY INDICATED AS "A TIME AND TIMES AND THE DIVIDING OF TIME" (DANIEL 7:25), THE "FORTY AND TWO MONTHS" (REVELATION 11:2; 13:5), AND THE "THOUSAND TWO HUNDRED AND THREESCORE DAYS" (REVELATION 11:3; 12:6). {GC 681.1}

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The above quoted is obviously affirming the validity of the day-year principle in relation to time prophecies in both Daniel and Revelation. It also includes the two Bible texts I have been asking about, namely Numbers 14:34 and Ezekiel 4:6 bolded in the above quote.

It still doesn't answer my question in relation to whether or not this day-year principle should apply in relation to all time prophecies.

Is prophecy to blame for divisions?

The passages I quoted a few posts back make it clear to me that Jesus applied Daniel's prophecy in a way that requires the day-year principle.

Jesus associated Daniel’s prophecy with the destruction of Jerusalem in 70 AD. Considering the time aspect of his prophecies it seems evident the day-year rule was applied. Otherwise, the time periods do not add up.

Daniel
8:13 Then I heard one saint speaking, and another saint said unto that certain [saint] which spake, How long [shall be] the vision [concerning] the daily [sacrifice], and the transgression of desolation, to give both the sanctuary and the host to be trodden under foot?
8:14 And he said unto me, Unto two thousand and three hundred days; then shall the sanctuary be cleansed.

Daniel
11:31 And arms shall stand on his part, and they shall pollute the sanctuary of strength, and shall take away the daily [sacrifice], and they shall place the abomination that maketh desolate.

Daniel
12:11 And from the time [that] the daily [sacrifice] shall be taken away, and the abomination that maketh desolate set up, [there shall be] a thousand two hundred and ninety days.

Matthew
24:15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:)
24:16 Then let them which be in Judaea flee into the mountains:

Mark
13:14 But when ye shall see the abomination of desolation, spoken of by Daniel the prophet, standing where it ought not, (let him that readeth understand,) then let them that be in Judaea flee to the mountains:

GC 25
And the Saviour warned His followers: "When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:) then let them which be in Judea flee into the mountains." Matthew 24:15, 16; Luke 21:20, 21. When the idolatrous standards of the Romans should be set up in the holy ground, which extended some furlongs outside the city walls, then the followers of Christ were to find safety in flight. When the warning sign should be seen, those who would escape must make no delay. {GC 25.4}

There are two clues that help us discern that the day-year principle should be applied to a prophecy.
First, the time elements in the prophecy are often expressed in unusual ways:
2300 evenings and mornings, or evening-mornings (Dan. 8:14)
A time, two times and half a time (Dan. 7:25, 12:7).

Second, the word "years" is avoided. Either the word "days" (Rev. 11:3, 12:6), or "months" (Rev. 11:2, 13:5), or "weeks" (Dan. 9) is used, or the word "years" is disguised, like in Dan. 7:25, 12:7 mentioned above.