I cannot respond to everything but this point strikes me:
pretty harmless observation
In a vacuum, yes, these are harmless observation. When you look at the broader picture though, you will find strong connections to rejecting all of science and to the far right.
Anytime someone mentions astrology (at least online, I do not know anyone who believes in it IRL) it is just a matter of time until they talk about the COVID vaccine and a supposed "New World Order" by the IWF, Jews and whatnot.
At least that's the case in Germany. You can read a bit more here, you may want to use machine translation. Article published by the Federal Agency for Civic Education.
https://www.bpb.de/themen/rechtsextremismus/dossier-rechtsextremismus/550441/rechtsextreme-esoterik/