It's not the condom's fault if you make a mistake. Condom material doesn't let sperm through, it's that simple, it's been used incorrectly if it did. Companies don't want to lose time and money with lawsuits hence 99%.

Also, anecdotal evidence while you weren't in bed with them isn't much of a proof, it's as valid as me telling you I've never got any girl pregnant even when we weren't using any protection therefore pulling out is 100% effective.