YEs, APL, based upon what we know, I think that people are over reacting.
Of course, there may be more that we do not know?
Check on the URL that I listed. In its concluding paragraph, it says:
Because MGUS is not harmful, it doesn't need to be treated. A diagnosis of MGUS in the absence of other symptoms usually does not warrant the need for more testing. But because MGUS may transition to a more serious condition, monitoring is necessary throughout your life in order to identify problems as early as possible. This usually includes regular physical exams and blood work.
Yes, we can pray for him and his family. It is a stressful time for them. But, unless there is more that we do not know, It does not appear to be as serious as some are making it out to be.