My issue with the masters divisions is that they start at 30. I tlreally think at least 35 would make more sense. Early 30s are prime years for grapplers; their bodies are still riding their peaks, but they've also had a lot of time to mature.
People approach 30 and think "I'll never do masters," because they think that the old guys are just wimping out. They then say as much to people in their gyms and online. They don't really "get it" yet, since they're still in their prime. Because people see competitors who qualify for Masters 1 winning in adults, they think doing the old guy divisions is just a cop out.