I understand where you're coming from and you certainly are right. Some naturals do look down on people who relaxed but not all. I certainly don't. I don't understand how naturals can act that way when they were relaxed at some point themselves (in most cases). But I digress... You can't make that generalization for all natural people. I'm not anti-relaxer. I do realize that relaxing is no longer something that is for me. But who's to say that it isn't for the next person. Or even me. I could change my mind at a later date.
I think most people are still relaxed because it's the norm. It's what they're used to doing (or all they've ever really known) so they continue to do so. Also a lot of people don't want to cut their hair and start over. And it's reasonable to feel that way. It's also a matter of convenience for some people. Some people don't want to spend a lot of time dealing with tangles, and knots, thick bushy hair, etc. Or some want to wear their hair straight the majority of the time. It depends on your hair and what you want to do with it. I had gotten to the point for a few years where I rarely wore my hair straight so there was no point in staying relaxed.