I’m torn about them. On the one hand they free up the combat design to be as wildly different from the exploration as it wants. Which can result in really creative stuff. Favorite examples are Undertale, MegaMan Battle Network series, and Tales series.
But on the other they interrupt the flow of exploration, the music, you forget where you were by the end of combat and they can be very annoying if they happen to be common or just as you’re about to leave an area. The consolation prize of growing stronger with every battle only helps so much.
I also hate grinding but sometimes I get addicted to it. Like my lizard brain likes watching the numbers go up. I recently loaded an old save in final fantasy and saw my level at 99, health at 999/999 and gold at 999999 and was like “I don’t remember grinding any of this”. It happens in a trance.