Well . . . there you have the rub. Are extremes in competition a good thing because the level of attainment needed to win is constantly increasing so the horses now have to be specially bred and then trained by specialized professionals to a high degree of finesse, or are they a bad thing because, well, because of the same reasons?
In my experience, the people who are the most likely think it is a good thing are the trainers, breeders, judges, and competitors invested in that particular form of competition.
Those who are not participants are free to have their own opinions and they often differ, often strongly. But if they pipe up with their own views and observations, the first group is invariably going to point out that those opinions are based in ignorance and hence have no value.
This is why these kinds of threads more often than not don't seem to go anywhere very useful.
JMO . . .
I think it just depends.
Picking on Cutters, they've bred all the size out of them. The good ones want to eat a cow, but they are too small to do much with a rope. They make great turn back horses which is at least still useful for a "j-o-b" and other disciplines involving chasing cows if they flunk out of high dollar Cutter stuff.
I think the other side of it is that people in these disciplines commonly don't do anything with them but Arena work for a specific purpose. We don't really know what the average [discipline here] horse can do, because all they do is their discipline. That horse might get well into their teens before someone just rides them for fun.
The Mare I'm having trained up right now is with a trainer that takes a long time but the point is get the horse a lot of miles and exposure, not just the nice handle.
I picked her because this horse will do a lot outside, be exposed to cattle by being used to sort, move and maybe some roping before she starts on focused Reining specific training. My intention with this horse is to do Ranch Versatility, Ranch Pleasure and possibly some EXCA type stuff so that is exactly what I wanted.
The WP horses I've seen seem like normal horses when not being ridden. I think they probably could do a lot, if they were asked.