Parents who are trying to get their kids of pacifiers or bottles- why don't you just take it away?

Seriously, I'm not judging. I'm just interested in why parents don't just take their kids pacifiers or bottles when they're getting too old for them. I've been blessed with the world's easiest baby; one day she was taking a bottle, the next she was onto sippy cups, not a single complaint. She weened herself off pacifiers at like 6 months. So I'm just wondering why it's not that easy for some kids and parents.

Once again, this isn't coming from a place of judgment just pure curiosity.