Honestly what percentage of runs are via the HR? 90%? It's gotta be close.
At this point everyone has already stacked their lineup with all power hitters. Combine that with the fact we have no control over pitches and that it seems swinging early or only making "ok" contact isn't deterring the HRs and basically you've got a game where anybody can hit a HR on any pitch with any decent swing.
People are saying there's a skill gap? I don't see it as much. As long as you've got a good enough internet connection or are playing on a screen with a good enough response time that you can catch up to fastballs, the game just becomes who gets the RNG to give them the most solo HRs