I've completely cheated my way through school
Do you think it was okay to cheat in school?
Yes, because cheating has never hurt anyone
It's still dishonest to cheat, even if you think no one is getting hurt.  You are failing to learn that material that will help you out later in life, and could even get into a lot of trouble if you are caught.
Tbh it's just school and it doesn't matter. If they are going to fire me they should come up with a better reason and not because of this.
They might not fire you directly for cheating, but if you are missing skills or knowledge that could harm your future, then having cheated instead of learning will be harmful.