That's me. I stayed home, avoided events, and waited to go to restaurants until cases were down. When I did go places, I went when it wasn't busy and sat outside. Avoiding COVID wasn't rocket science, all you had to do was follow the basic principles of disease prevention.
Now try it with kids or a partner who works in health care. Personally I was quite strict like you, but had it a couple of times due to external factors becoming internal factors.
My wife is an ER nurse and I never got it. Funny thing is she didn't get it until she was in the hospital getting her gall bladder out. We also had two kids in elementary at the time, and they never got it either.
I won't pretend that luck wasn't a big factor, but my wife worked at a senior living facility and I managed to avoid catching it. Hell my wife even caught it, but she moved into the guest room and we just treated it like a clean room