Reddit mods have less power to remove unwanted speech than Lemmy admins do. If you are upset because mods would not let you say something in their communities, Lemmy is not going to be more accommodating for that.
Howso? The Fediverse literally gives you the option to choose from among several different instances. It's trivial to migrate to an instance you find better suited to you, if you don't like this one.
Mods and admins are connected across instances on Lemmy. I have seen someone get banned from their own instance for posting something, that wasn’t even against the rules, on another instance. These power structures are not transparent and can bite you any time.