I agree you might get more kettle trub with BIAB, but it all settles out after fermentation, and BIAB produces brilliantly clear beers just the same as any other process.
I've let my wort chill overnight in the kettle and the wort is crystal clear if you siphon to your fermenter carefully... I don't bother with it anymore, because I find it has no real effect on the finished product, except that you lose a liter or two of finished product by leaving it behind.
I think what the OP is experiencing is more driven by siphoning technique than a side effect of the BIAB process. I've had floaties in beer because I slipped the siphon a little too close to the yeast cake before, or there was still some suspended krausen particles that got sucked up. The good thing is that it will all settle out after some time in the fridge.