I guess I’m a bit different. Have had two cavities my whole life, had one tooth pulled besides wisdom teeth and I’m 65 in a couple months. A lot is hereditary, streptomucens etc. My brothers and sisters have similar problems as you.
My next younger brother (63) is like you: indestructable teeth. Even though he has not taken very good care of them. Maybe two cavities. Drinks soda pop like water. And his baby teeth didn’t start falling out until he was a couple years older than I was when mine fell out.
Well when I was 20 back in 1982-83 I was working for Fedex (Federal Express back then) and I had dental insurance and my teeth were pretty much destroyed by this corrupt dentist that would have big breasted assistants stand over me literally with their boobs inches from my face and he would give me nitrous oxide and then proceed to drill the crap out of my teeth for the insurance money.
I trusted him and years later when all the root canals and caps started falling apart another dentist told me I got scammed, and if you can believe it the bastard is still practicing and he blocks all reviews of him on the net. I called a lawyer and he said I waited too long to sue, so I’m pretty much left with a set of teeth that are a disaster. One of the infuriating things in my life because it’s cost me a fortune to save the teeth I have left.
What drives the knife deeper is my brother who is gay went to him one time back then and immediately recognized what he was doing, the big breasts didn’t work on him, and he got up and left after this dentist told him he had 14 cavaties, and he WARNED me but I was too stupid, I thought he was a cool dentist