I take it you don’t have anxiety.
You can’t “just stop saying sorry”. You do something, something so little, like accidentally bump into someone. You feel horrible about it. Your brain starts panicking and you have trouble trying to breathe. You stutter an apology. They say it’s okay, but you accidentally do it again, and you apologize again. They just say “Aha, you can stop saying sorry.” And you feel horrible that you’ve probably made them angry or upset, so you mutter out an apology for the third stupid time, and they just say to stop saying sorry. Stop saying sorry.
You can’t just tell someone to stop saying you’re sorry.