Should 3 months old drink water?

What's the reason they wanna feed the baby water? I had the same issue, my mom kept insisting wanna feed my newborn baby water and her reason was worried baby doesnt like to drink when hes bigger. That's bs! I am the mother, I know what's best for the baby, I just ignored her and make sure she doesnt go close to the baby in case she sneaks some water in.