Either way, your mom sounds like a sweetheart.
When I was little I told my mom I was sad because some kids were bullying me. She said I should tell them that when they bullied me it hurt me inside, and they would stop. I did what she said. This was bad advice. They did not stop.
Maybe use the open-door policy sparingly.
“I have an open-door policy so don’t hesitate to come see me if you have any issues at all!”
I learned the hard way to never trust any boss or HR rep that says that shit. Utilizing open-door policies is a damn good way to get fired for being a “troublemaker”.
That’s not how any of this works.
‘Just open another credit card, it’s free money’ coming from my friend who is in thousands of dollars worth of debt and has no idea she will eventually have to pay that off.