PvP is inherently not repetitive due to the fact you will be interacting with many many different people over your gameplay sessions. And people are random, inconsistent, and weird.
Also, some people like honing a particular skill. It’s not really about being afraid to try new things, but rather trying to be better at one thing.
There’s a famous case of a guy who got a railroad spike blown through his frontal lobe and he basically became a huge asshole.