I don't really disagree so much.
But you touch on a lot of points. As of now I have 4 followers on Twitch and when I stream I usually don't have anyone watching. But here are some points I'd like to bring up.
1) 'no market for it' , I'm not really looking to get cash out of it, even if that not what you meant. Actually some gamers are playing stupid games like Minecraft and making more dollars per hour that I have at my job. Many popular GAMERS are making approx over 60 bucks and hour. This gamer 'Summit' streams full time as his job. He's got about 234,995 followers.
1b) 'no market for people to care to watch' , well maybe but if a whole bunch of people start doing it, others watch. Like Honey Boo Boo. The thing about Twitch is that it's not just the game, it's the interaction w/ the audience...it's like hanging at a house party and someone is playing a game and talking to you.
A lot of people just watch gamers because the person is friendly, and many don't even care what game they are playing. That's a key point.
2) I do it just because it's fun and free, and then I can watch my archived game and learn. This is a big point, I can see my power meter, back spin, ding or not ding, etc, and that is not recorded on your WGT replays. I've learned a lot in retrospect by seeing my game again.
3) you can easily edit highlights and take the best part of the game and make a clip. This is cool because instead of watching a whole WGT game (even though some players like the OP and others want a gallery ** ) you can watch just a 45 second clip of the best parts.
4) some of the great players on here can mentor w/ the voice chat or give great tips while they play, then make a highlight or tutorial video. The whole forum is filled w/ people saying a lot of the same things and tips, many times they will link a video also, or show a diagram. Twitch has much more possibilities to facilitate this process of giving WGT tips and advice.
5) It's just plain fun. Even if it's not popular, it's fun to broadcast. It makes WGT a better game IMHO.
**
Some members requesting a spectate feature (just the members we know about)
http://www.wgt.com/forums/t/99602.aspx
http://www.wgt.com/forums/t/4206.aspx?PageIndex=1
http://www.wgt.com/forums/p/153465/1045520.aspx#1045520
http://www.wgt.com/forums/t/2825.aspx
and here are several WGT forum posts mentioning twitch
http://www.wgt.com/forums/search.aspx?q=twitch