Actually, Fordy and friends intentionally distressed the tips on several of the prototype HHTs during testing in Australia.
They wanted to see what differences in terminal performance were observable with different tip configurations.
Some bullets were shot into animals with no tip installed. Others, they ground the tips down and made the tips flat/blunt.
Final results were the standard tip performed the best overall, by a good margin.
Minor imperfections/dimples in the tips probably have no downside at all - other than cosmetic - in a hunting projectile.
As Butterbean noted, scratches or other imperfections on the base of the bullet would probably be a greater concern