The best thing about contactless cards is the additional scope for free drinks. We have an unsaid rule that if anyone we know leaves their card/wallet on the table and leaves the room during pints they’ll be getting rinsed. Sure, it’s fraud, but definitely fair game.
I can see why contactless speeds up transactions, but nobody’s ever really in a rush, and i’ve mislaid so many cards i wouldn’t trust myself not to lose another and not notice for a few hours. They probably have security stuff in place to ensure you get money back and all that, but i’m too busy to check.