I honestly don't think that's the case. There's tons of right leaning and left leaning people that are bots. You can just never know. I think it comes down to the age range using this place and the culture using it. Reactionary people prefer sites like 4chan or the other online communities designed to cater to them. The age comes in because based on research the largest age demographic using Lemmy is between 25 and 35. This site is too underground to attract the middle aged and older cohort that are right wing. It's also not hip enough to attract the under 20 crowd who make up the bulk of Steven Crowder, Ben Shapiro and Tim Pool viewers.