No. They’re still celebrities, it’s up to you if you think they’re worth watching. If 90% of them you say “who the hell are these people?” then don’t watch. If 50% of them are at least people you recognise from their guest spot on Law and Order, then give it a chance. Or not.
Consider our own Celebrity Death Pool where we will list obscure second-tier football coaches as worthy of note. Personally I consider them celebrities if they have earned their own Wikipedia page with at least a screen-and-a-half of info on it.