Not that long ago PADI required a night dive for Advanced. There were some people that couldn't handle a night dive so it was eliminated.
IMO to be a Master Diver a night dive should be mandatory.
The master thing could be beat to death. Pretty much already has.
As someone posted, it might be better to have levels instead.
In skydiving they have 4 license levels , A,B,C and D. At a drop zone they
had certain jumps that require a certain license to participate in certain jumps.
We live in a psychological marketing driven world. If they can make someone feel better about themselves they'll do it.
Both scuba and skydiving are spin offs of heavily disciplined military occupations. In the beginning they were much more macho oriented. As marketers saw the opportunity to make a living or corporation out of it , it evolved to where we are today.
Compare todays ntrox with computers specialty to two years ago. Wow , what a difference.
It's changing . Is it for the good ? I don't know, we'll have to watch the mortalities.