Just answering this one:
"Picard" is a very specific sequel, to a very specific character, played by a very specific character. Recurring elements from this character's history there is not "fanwank" or "needless fanservice". It's following up on core part of this very character's story.
If OTOH there was a new Trek show in the post-TNG time, on a fresh new starship, with new characters, and a fresh young actor as lead - THEN it would be "fanwank" if all they ever did was to introduce TNG/VOY/DS9-characters or elements or follow up plot-threads from there.
Apples to oranges. If they do a Pike-show - no one is going to complain that it will carry over recurring characters from DIS, like Pike, SPock, No. 1, Sarek or Empress L'Rell. Because they would belong there. But it would be fan-service if they then continue to introduce completely unrelated TOS elements like Horta, the Doomsday machine or the Gorn. Should be easy to understand, right?