Oh my god that is such a pet peeve of mine. Actual baby trousers don't have them, why put them on adult baby ones? It is so much more work to close snaps all along a wriggly baby's legs than it is to just pull the waistband down. I get them on dungarees and rompers, since you would have to pull their arms through the piece of clothing to get at the diaper which a lot of babies don't appreciate, but otherwise it's so pointless. And aren't the snaps uncomfortable when you move? Normal crotch seams can get bulky enough, why add more material? Not to mention they make the trousers not really appropriate to wear in public, which I am mad about. If I'm gonna be spending that much money on a piece of clothing, I wanna be able to wear it outside, and if I have to stay indoors anyway, I will be wearing comfy leggings and not some weird jeans.