But the people who do enter dozens and dozens of beers are just ruining the experience for other people IMO, especially since they're crowding people out.
Crowding people out for what exactly? If you want to win the category, brew the best beer.
Granted if you want to win the entire shooting match (Ninkasi) you'll need excellent beers in multiple categories. Really want to be the best, win Homebrewer of the Year (BOS) and the Ninkasi. I cannot recall the last time that happened.