Would you give out more likes if it was a simple tap?

Yes

Possibly, but I like the deliberate nature of the swipe to confirm. Along with the cost, it gives a nice deliberate weight to those hearts.

For relatively low value txns such as likes and comments, I’d prefer a tap, it is just (imo) a better UX

Would be cool to if you could toggle the swiping on/off. I wouldn’t be surprised to see this offered in the future.