Couple of evolutionary pressures that would make sense to me:
1) Human ancestors didn’t live as long, giving them less time for teeth to get misaligned in a terrible way.
2) Animals will tend to lose teeth for various reasons, so some extra teeth (including eg. wisdom teeth that appear during the prime of life) are probably useful spares more often than not. Not enough teeth was probably a more
likely cause of death than too many.
1) Human ancestors didn’t live as long, giving them less time for teeth to get misaligned in a terrible way.
2) Animals will tend to lose teeth for various reasons, so some extra teeth (including eg. wisdom teeth that appear during the prime of life) are probably useful spares more often than not. Not enough teeth was probably a more likely cause of death than too many.