Personal limits can be pushed. They should be pushed. It isn't about accepting limits, it's about understanding where they are and working to push them. That's where kleinbl00's positive spin on your post, the italicized bit in his first reply, fits. You're already doing the right things, and approaching them more positively can be really good.
It isn't about dejectedly accepting limits, it's being optimistic at understanding them and knowing you can work on pushing them. It doesn't matter if others don't have to do the same. They have their own limits and work to push them, regardless of how that limit compares to yours.
You can push limits.