Many people don't want to leave Reddit (or any major community) to use the alternatives because every alternative starts out trying to let everyone have a voice, no matter how repugnant, and ends up being filled with fascists. The good users leave in disgust while the fascists gather more fascists, until the prevailing opinion of the masses is "I don't want to use that site, it's nothing but fascists." This either kills the site or, if the owners are okay with it, turns it into something like Voat, which no self-respecting person would want to use.
Whether you agree or disagree with them, or with the belief that they should be allowed a voice on every platform and in every community, it is undeniably bad for any service they congregate on. It's your decision if you want to open your table to fascists, but it's everyone else's decision to not sit at your table because of it.
OC Difference between kbin and lemmy?
Why do you use one over the other? Also, what's the deal with Calckey?