This was more applicable when cutting kesh was rare and rules like these helped nip the problem. The situation is inverted now. Also, is it better to never even attempt amritdhari life ? Atleast Makhan tried for a few years, and he still holds immense respect or it. Just leave the guy alone and let him come back on more firm footing in the future.
Plus, there are many kids from (amritdhari) families that take amrit at a young age, but cut their kesh in their youth. Do you think it would be fair to namecall them as sirgums while their peers get a free pass?
You have to evaluate these maryada rules on an ongoing basis to see what helps the panth and what may end up causing more harm than good.