Maybe who's to say.....

Well after some serious thinking I've come to the conclusion some babies don't crawl. Everyone has been getting on me lately because shows no attempt at wanting to crawl. She hates tummy time she'd rather sit up which she's been doing since 4 months(she's not lacking back muscles) or stand with your help. I can't force her to crawl can I? I don't see what is the big deal some babies don't crawl till after 9 months and some skip and go straight to walking. I don't know. :/