Sam Hill always wears flats doesn’t he? and won the last world cup race?
Not that it really matters to us.
I ride flats, couldn’t get on with spd’s, took some of the fun out of riding for me, and I kept coming off.
Look at your technique, keep your heels down and you shouldn’t really come off. 5:10’s will certainly help, it actually felt like been clipped in going from skate shoes to 5:10’s.