can someone explain this? I don’t get it

I had that. The 8th (wisdom) tooth grows in that position. At first there’s no problem but it starts to create pressure on all other teeth and eventually starts to hurt as it’s pushing against the 7th tooth. The solution is to take out wisdom teeth, which is a quite common procedure any way. Don’t know what the “infinite money” is about. Maybe this is some USA thing.

Costs like a thousand dollars or more to get them taken out here

Or free if you do it in the military like I did