Thoughts on characters who are otherwise superhuman, but just as vulnerable to getting shot or being stabbed as a regular human?

I'll use Naruto as an example; despite the characters being able to withstand seemingly limitless amounts of blunt force and chakra-based attacks, sharp objects remain a threat to them all the way up until the end of the series. So despite all the chakra stuff, the characters are physically no different from regular people and have no defense against sharp projectiles or bladed weapons other than "don't get hit by them".

I'm of two minds about this; on one hand, it doesn't really make sense that a bullet/arrow/sword/shuriken or whatever can pierce the skin of someone who just shrugs off everything else, but on the other hand, they need to be vulnerable to something, and making it so that superhumans are ultimately still, well, human on the inside despite how powerful may be otherwise is a good enough way of doing that.