As a minor you are the responsibility of your parents/caregivers and as such any social relationship with you would require keeping parents/caregivers in the loop.
This is a really bad analogy but it's a tiny bit like if I wanted to hang out with someone's pet without them. It'd be a little weird, and the pet is subject to a whole host of circumstances outside their control.
As an adult without children, there's really no reason for me to be hanging out with minors when there's so many other people I can hang out with and build direct relationships.
One objection may be that your parents/caregivers don't need to know, it could be a secret. Secret relationships aren't great for anyone involved, so again, another reason to not engage.