Yeah that was me as a kid. 1-2 siblings, parents worked 7am-6pm or later, and mom travelled a lot for work. I did all my own stuff starting at ~6yo, cooking/cleaning/laundry by 8yo, caring for my baby siblings starting at 11yo (including overnight childcare).
I don't resent anyone for it (no cope, I think my childhood was good overall). Parents both started from absolutely zero and became very successful. Both parents were loving and supportive. But I definitely am left with the feeling that if I can't handle something, someone else will either do it incompetently or not think to do it at all.
That attitude has not yielded lots of friends or the support I probably need. People assume I don't need anything and I don't know how to ask.
My parents were both raised the same way and also turned out that way.