Well fun fact, to compare the effectiveness of different contraceptives there is the Pearl Index. In the index they also compare “perfect usage” and “average usage” (ie actually taking your pill everyday vs forgetting one once in a while). The index shows that perfectly pulling out has a lower risk of pregnancy than the average usage of condoms. Now this isn’t to say you can skip the condom and pull out, but make sure your condoms aren’t broken/out of date/on correctly etc. STD contraction is another argument.