Basically a roundabout way of asking: How much do people really care about you?
I know I could vanish for like 48 hours and my parents and older brother probably wouldn’t even want to look for me (I’m around 18-25, not a minor so they have no legal responsibilities). Nobody in the world cares about me. I mean they already told me that in my face that if I went missing, they won’t care.
By the first evening by 9pm, when they didn’t get dinner.
I would take that “we don’t care” as an invitation to leave and start a new life with people who do care. Nobody should say that out loud, what assholes, but since they don’t need you, you are free.