Birch doesn't even make good firewood.
Why ask if it's suitable for bonsai when you read they suck?
Birch may not make great firewood, but it's an amazing fire starter. Best natural fire starter I know of. The resin in the bark will even light up when it's raining.
Birch is definitely a challenging species, but I'm convinced it's not impossible, and it's definitely not without value. I have a river birch in my collection that taunts me throughout the year that I haven't given up on yet. I've enjoyed working with it enough that I'll probably get another one if/when I outlive it.
But yes, the downsides are there. They don't live an incredibly long time, and they die back brutally if you prune them incorrectly. But there's a certain beauty to them, and I enjoy trying to tame the wild beast. They do back bud, they can have good ramification, they have killer bark, and even larger branches stay flexible for a while so you can manipulate them.
Absolutely not a beginner's tree, and not for those without a lot of patience for set backs, but one I've found pretty rewarding to play around with.
Like Sorce said, people get lots of pleasure out of building sand castles that just wash away within a day. Birch is my sand castle. I just enjoy it for what it is.