I’m beginning to think I don’t know how to use anything

That's not something you learned. That's not the purpose. Also, your door isn't hung right if it swings closed on its own.

not an issue if the door is hung correctly.

you never heard this before

I’m more concerned that she keeps mixing up opening/closing the door

Because it's going to end up tearing a little spot in the bottom of your door cuz that's not what it's used for. Just fix your door dude.

No chance this is by design - if it was, all door stops would be flexible.

I don’t even know if I’m breathing correctly watching these

What the……I thought it’s only other function was making that noise like an instrument

To protect wall and door

That's not the best idea.

This us.