I don't decide, doing anything involve some risks, some of them can't be eliminated. Or, I guess I can decide to not do anything, but it won't get me anywhere.

To go back with the human analogy. I have a server in a datacenter, there is a weakness in that someone can go to the machine physically and do nasty stuff, including hitting it with a literal hammer. This is a risk, but I can't do anything about it. Someone has to do the maintenance. But it can be mitigated with access control to the datacenter, among other things.

If the door to the server room can be opened with a toothpick, that's a vulnerability and it has to be fixed, because to "real" solution of not letting anyone in is not viable. I didn't chose to let people in the server room, it is just impossible not to.