I feel you didn’t read the original post. It isn’t about expecting privacy, it isn’t a criticism of the fundamentals of Lemmy as a minority seem to be taking it (there are many ways I explain how it is more private from being tracked and profiled).
It is designed for your actual traceable information to be kept safe by the gatekeepers, the admins. Users must be highly aware: everything else you do here is public in a way you may never have experienced before.
Don’t hand wave the concern about post/profile/vote/message privacy, explain how the privacy goal is different here and how one might mitigate the aspects they are not comfortable with.
If you want a more in depth write up on the elements you are talking about, take a look at the link that is provided to a policy primer in the original post.
It is about understanding how privacy is maintained on a federated platform.
Many users coming from other platforms do not understand the mechanisms here and how they are different.
Take a look for the comment here about vote privacy (the highest voted comment here) or dozens of the other posts where people are coming to this awareness. Many assumed was private due to coming from a platform where this was.
A server that intentionally doesn’t can be easily defederated.
This shows that you don’t understand how it works fully yet yourself. Defederated will prevent your local from accepting their posts, not the other way around.
So, obviously an anti Lemmy bias there, and not entirely true, but there are some aspects of federation it can be dangerous to ignore.
There is a different primary privacy focus here, and it provides an extreme level of privacy but places an extreme level of responsibility on the user for their own privacy, more than most places.
There is a distinction to a potential scrape and a system designed to duplicate, often irreversibly at submit.
There are also other things people are often not aware of and the community is not doing a great job communicating. Admins are not doing a great job of protecting themselves either.
For instance many, still don’t know votes here are entirely public.
If you understand this all and are comfortable, great. Many do not prepare themselves and would engage differently if they had a better understanding.
For a take by someone who is pro-federation but not ignoring these concerns see: https://lemmy.ca/post/948217