This has been discussed elsewhere, and using ARC is ultimately a decision about risk.
Here’s a short answer.
Risk is the possibility of something bad happening, so to put this in perspective, I think of ARC in terms of a locked front door in your home. If someone doesn’t have the key, they can’t get in. If someone you don’t know knocks on the door, you ignore them.
Should you have the door?
Here’s a lengthy discussion …