I'd say it's more convenience than elitism.
I'm in BTN and it's the only indexer I use for my Sonarr instance because it has absolutely everything. I've never not been able to find something and almost everything I download will saturate my 1.2 Gbps connection.
For Radarr I don't have any private trackers and it takes 35 public trackers to get coverage that is almost as good. The options I'm given are way less organized and download speeds are a gamble. It's not really an issue because I rarely watch movies, but I definitely understand why private trackers are so sought after. I'll eventually try to get into some smaller ones which tend to be pretty easy to do.
On top of what others have said keep in mind shorting isn't just you saying the stock will go down, it's you saying the stock will go down more than others think it will. Tbh I wouldn't even touch anything to do with shorting or options if I were you. It's incredibly risky and should only be done by people with more experience than you and I.