If you want one profile across the entire fediverse, then host your own instance? Or link your accounts to one central website you own or to one profile you own, e.g. Mastodon or Matrix.
I don’t think “you can host your own instance” is a very realistic solution for the vast majority of social media users. “Just learn to be a sysadmin so you can post memes” is pretty user-hostile.
If you want one profile across the entire fediverse, then host your own instance? Or link your accounts to one central website you own or to one profile you own, e.g. Mastodon or Matrix.
I don’t think “you can host your own instance” is a very realistic solution for the vast majority of social media users. “Just learn to be a sysadmin so you can post memes” is pretty user-hostile.
Because it was certainly the only solution I proposed…