I mean, Lemmy is obviously a smaller, more tight-knit community than Reddit, but I wouldn't say that it's "insular" or rejecting of many viewpoints.

I was perma-banned on Reddit for criticizing Trump and the AI industry, as well as making a jab at the horrible and inhumane Yulin Dog Meat Festival in Guangxi, China (which by the way is a 100% real thing, should be stopped, and just happens to be running right now...). So I feel that Reddit is largely in the pocket of certain groups and are willing to stretch their moderation rules to stifle certain kinds of speech that challenges their shareholders.

On top of all that, I think that the Fediverse in general is a little bit friendlier and much more real than Reddit these days, which I like. Whenever I find myself browsing Reddit (without an account) recently, it's only a matter of minutes before I come across some post or comment that is obvious bullshit, be it something clearly AI generated or just a good old fashioned lie. Reddit has really become full of nonsense and slop these days, and I think even people who continue to use Reddit are able to see that it isn't what it used to be.