I ride bitless too -- rope halter. Not because my horse is perfect and I trust her and she's amazingly well trained. If my horse really wanted to run off with me or not listen, she would do so no matter what I had in her mouth (or on her nose). I could ride in her a bicycle chain or a snaffle or a mechanical hackamore and not be guaranteed any "control".
If she doesn't want to listen or she wants to bolt, nothing on her face will stop her legs from moving. Bit = control is an illusion. Bitless = less control isn't true either. I believe my rope halter is harsher than a snaffle bit. I have better "control" with it than I do with the French link I use when I need a bit.
So I ride bitless for the simple reason that my mare likes pressure on her nose more than in her mouth. Mouth pressure makes her lock her jaw and become tense all over. She also eats and drink better in competition without a bit.