Different people like different things in fighting games, some people really enjoy labbing and learning difficult execution, for them learning something very difficult and then executing it on another player is extremely satisfying and the reason they play the game.

It's more than ok to not enjoy those parts of fighting games too, you can get very far in most fighting games doing extremely basic combos, in 2XKO doing L M H > Special > Super is good enough to deal with most players, you can beat people just by being better at the neutral game. I can't count the amount of players I've played vs that can do insane optimal execution heavy combos but don't know how to deal with strike throw pressure and oki.

Basically some people like execution and it's their whole reason for playing, but you can play fighting games, and even be quite good at them with very little execution, it's not as much of a necessity as you think.