I see our disconnect now:

First, I interpreted your “wrong” incorrectly (I interpreted it as not allowed vs thinking a fact is different than it really is)

Second, it seems definition of the word “opinion” is different in your region. In my region, you can’t have opinions about facts that can be scientifically measured.
To give an example, you can have the opinion “all people need to treated the same” but you can’t say “my opinion is that water melts at -10 degree Celsius”

So with that definition, no opinion can be wrong. Since if an opinion can be wrong, it would not be an opinion but a stated fact, or better said what the person thinks is fact.

And applying this thinking to your initial comment, it should show why I was confused about you telling this stated facts are opinion that are wrong.

And now comming back to your initial comment:

In the post Xenia being furry is stated as a fact.
Xenia hating systemd is stated as a fact.
And PulseAudio having issues is stated as a fact.

Which of course can be wrong.