First, let me point out yet again, that according to the College Board itself there is no such thing as a “valid” or “invalid” reason for taking the test. Anyone who registers, pays, and produces proper ID can take the test, and, as already mentioned above, there are numerous reasons for an adult to do so, none of them “invalid.” (And yes, I will admit that “cheating” is invalid, but I am not aware of any connection between cheating and adult test takers, and if College Board believed there was one, it presumably would simply bar adult test takers, not just transfer their registrations to the next date.)
Second, as already pointed out above, the process outlined for adult test takers who can prove they have a “valid” reason is indeed “difficult.” These are people who may have registered as long ago as last summer or fall; they may have scheduled time off for work this week for studying; they may have made other plans (other than continued studying and test-taking for the remainder of March and for April and May). Now they are in limbo–their paid and confirmed registrations were unilaterally cancelled by College Board, and they have to spend the week appealing, trying to convince College Board to reinstate their registrations. Even if they prevail, they may not know of their result until the end of the week. Does that really seem like a reasonable burden to place on people who already registered and paid according to College Board’s own terms and rules?