I do and I don't, I've bought my daughter a few pairs recently to get her used to wearing shoes but also at this time of year, as well as slippers, they are good just to keep their feet warm when you are out in the pram as well as in the house x
I mean if they’re showing signs of standing / pre walking then i see why, but if they’re just crawling I don’t see the point. I work In nursery and we’re constantly putting them back on. We suggest grippy socks instead for when they pull to stand etc.
I personally don’t think they are for crawling, but a good idea for getting them used to wearing shoes. As I know people who have had trouble getting them to wear shoes when it comes to needing too as it’s not something they’ve been familiar with.