I agree, and I’m pretty much “grey rock” with certain people in mine, mostly because they’ve proven themselves to be untrustworthy and disrespectful (covert and otherwise). It’s worse when family let you down because of the implication they’re meant to have your best interests at heart, no matter what.
Being family doesn’t mean they’re entitled to force relationships/sharing stuff with you. I love my mum but still don’t want to tell her everything.