Do you need to bring you diaper bag to the hospital?

I see pictures of people with their diaper bag and hospital bag ready to go. The hospital provides diapers and everything so I don't see a need to bring my diaper bag when all I need for the baby is a few onesies and socks lol. My hospital doesn't give pacifiers and bottles to encourage breastfeeding so don't need those. I have a blanket with my stuff.