There is a reason why they don't all make it - some of them just suck or put on a boring fight. Nearly everyone that gets into the house gets onto the TUF finale. But even if you have a good performance on the finale that doesn't mean you will still get anything after that.
The UFC has done a fantastic job of cutting the fat so to speak with regards to the fighters on the show. The fighters either put on a good fight, or get the boot and go onto other organizations.
The goal of TUF is to find the best talent and personality. Personality alone won't get you in if you have a boring fight or if you just get dominated.
I do agree that most of the guys should go to the WEC, but the problem is the WEC doesn't put on that many shows.
Don't censor me bro!