Most percussion shooters are not aficionados of their weapon like flint shooters are. I shoot both. If my percussion rifles or flint rifles fail to fire, then it is my fault and not the weapon. That is unless I get another bad batch of CCI caps. Then it is still my fault for not making sure the percussion compound didn't fall out LOL.
Us flint shooters always make sure our flints are sharp, our powder is dry, our frizzen is good, and our touchhole is clear. Nothing can go wrong, and it will fire. If all of us flint shooters had a percussion match today and the prize was a date with Kim Kardashian (providing our wives would let us) I'll guarantee all those percussion rifles would fire because we would do our homework.
A seasoned flint shooter is passionate about making sure his rifle will fire in front of other shooters, so he is not embarrassed. The average percussion shooter thinks his rifle will fire and when it doesn't it is his fault, but he won't admit it.
A seasoned percussion shooter's weapon will fire every time if he puts the effort into making sure it will like the seasoned flint shooter.