I mean using your real name does not depend on the platform you’re using but more on how you’re using it.
Pretty sure the majority of reddit users do not post under their real name and you could use a pseudonym on facebook if you wanted to.
Zuckerberg isn’t going to check your ID when you sign up.

Your data isn’t really more private on the fediverse, is it?
Everything you post is shared with myriad instances.
You might not end up just handing it to some large tech corp but you also give up any remnant of control over it.

Ja, passt schon

Berlin clean and beautiful? This must be some alternate history.