I just did the math. 20 baby teeth, 32 adult teeth, 80 year lifespan.

Losing your adult teeth is neither universal nor inevitable. I've lost
only one of them -- due to a crack likely caused by a genetic defect.
I expect to have all the rest when I die.

I lost four wisdom teeth, all at once.

I had all four of mine extracted in 1970. But the deliberate extraction of
commonly impacted teeth is not a "loss".