You're really on to something here. My hair is not MBL but I'm past APL and it's all due to no combing. My journey started past SL but I can tell you that IMHO, it is going to be more difficult to style your hair with your hands and without a comb when your hair is shorter because there is no length to play with. This is especially true with the NG kicks in because that shrinks the length up even more.
When my hair was shorter, it was more difficult to keep it flat and taut, even with a scarf, because all the hairs generally don't reach far enough back to fit into a pony holder. It's also more difficult to make a neat bun without some type of pony holder since you don't have enough length to wrap around itself. I wore a fake pony alot more often when my hair was shorter and relied heavily on the Sylver2 Scarf Method to keep my hair flat and taut.
I don't have a solution for wearing your hair out when it's shorter because I never did. I didn't have a bang either. I was a faithful UPA clip or half-wig wearer always with a baggy. However, you can still smooth your own hair back with your hands, but you are going to have to rely on the scarf to keep it flat because there's no length to give you any type of slight tension if you know what I mean. I wear my hair out alot more now, but I'm trained with the fingercombing. Had I known then what I know now, I would have been able to wear it out even when it was shorter. Someone above mentioned it becoming a "habit" and that really summed it up. Keep practicing just using your hands and it will eventually become second nature. Trust me........I thought it was impossible at first but it's not. HTH!