Andy, you I think are making the mistake many make when talking about MMA and the UFC. In the UK fighters are amateurs (using pro rules) fighting because they enjoy it, there's no money in MMA in this country, to compare fighters here who all have day jobs and train MMA the same way you train TKD, probably for the same reasons, with the fighters in the UFC like comparing the hospital radio DJs with the BBC ones. The fighters you see in the UFC are professional athletes. You wouldn't do it in other sports such as football, those who turn out on Sunday morning aren't compared to Liverpool, Man Utd players etc.
We rarely can have day before weigh ins because the fighters are still at work, many of our shows are on Sundays when venue hire is cheapest so fighters have to go to work Monday morning. Can't see the UFC fighters doing that. We have some small shows which do have 'not so good' fighters on, they enjoy it just as much as the TMA people enjoy their kumite and katas comps they do. No one compares the people from a small 'an hour twice a week' TKD club going to a comp to the top Olympic competitors. For many just like you taking part is the thing not the winning even though it's nice to win. It's a sport that many like doing, you don't compare them to pro athletes.