You are not wrong. But there are things you can do to make a point. Make Reddit as a 2nd class citizen and drive people to lemmy, mastodon and the others. Like add posts with no comments, just relay bot, … Make it clear.
Same with GitHub, it’s mirror to my Gitea instance. You can see stuff but you have to move somewhere else to contribute and report issues. Not a terrible thing to use these proprietary services and yet make them 2nd class citizens.
To me it’s a feature and not a problem to have less people. I had more online human interaction in lemmy than I had anywhere else (except maybe facebook in early times). Look at Reddit now, good luck interacting with real genuine people. Everyone is shilling something and nobody is honest, plus the low quality posts count growing.
I saw some studies a few years ago on how people are less interested in traditional social media and more interested in instant messaging 1to1 and small group chats. Also something about how group chats become dead after they exceed a couple hundred members.
Just to say, I am more happy with the way things are in lemmy. I appreciate all aspects of Lemmy really.