Maybe you haven't been following the thread, but you missed the point. My emphasis isn't on the physical gi itself, but the fact that most people who only train no gi are TUF fans who think they're going to be pro fighters. I've never seen anyone show up to ONLY no gi classes and last for more than a few months.
Wrestlers do well because they've already started with X amount of years of prior grappling experience, the athleticism wrestling takes, plus the work ethic it instills.
That I don't buy on, mainly because I run a school that never uses gis and just don't see that.
The gi being a physical object is a important, and the guys that started playing around at home and with friends are obviously not going to go out and buy a $150 gi to train in when it doesn't even suit what they perceive as their goals. So anyone that has been wrestling a little with other guys that don't know what they are doing and from hat think they should be heading into MMA fights right away given how well they've been doing on their own is going to have done no-gi. And as soon as they realize the workout is tough and they really don't have any skills yet they often quit.
It's also a piece of equipment that is not a part of what they want to do. They want to train in submission grappling, wrestling, kickboxing, etc. Doing the same sort of training they see on TV, and working on the same skills they see on televised events.
To be honest, you aren't giving them the sport they are looking for if you are trying to push them into BJJ anyways. They came in because they wanted to learn MMA. Chances are a good number will quit because its hard, but for the guys that do come in specifically wanting MMA, if they don't find what they where looking for chances are they won't stay.
If I where wanting to play hockey and showed up and got handed a pair of figure skates and a funny uniform and told I have to learn figure skating first as it will make my skating more technical... well, I wouldn't last long.
But that's what a lot of BJJ schools seem to do. Guys come in wanting MMA and they say "yeah, yeah, we do that" and hand them different gear, and give them different rules then what they wanted to learn.
From my perspective I could infer that things are the opposite. For the most part the guys that care about gis and belts don't last long. Anyone that comes in with a goal of getting a belt and wearing a fancy uniform, just don't stay longer then a few months. Which is fair, we don't do those things.