I think those are mostly to prevent callus and skin tears on the hands.
I have a scoliosis too, and I mixed grip when need be, even though I dislike it. But if you don't plan on competing, you can get away without doing it. The hook grip hurts, but unless you have carnie hands, you should be able to hold onto the bar up to pretty close to your max. Use it. Learn to use straps properly, because they work and do allow you to hold on to the bar if you know how to use them. It sounds like you're looking for an easy way out. These are deadlifts. There is no easy way out.