So what you are saying is ninja can still be alive once they run out of chakra? correct? Since stamina and chakra are 2 different thing according to you.
stamina: the ability to sustain prolonged physical or mental effort.
Again RECENT Manga shows chakra = stamina. I used to claim people weren't born with chakra.. but apparently people are born with chakra. Its the life source of Naruto-verse now.
- Hashirama couldn't do anything because was nearly out of chakra..
- Tobirama couldn't do anything because he couldn't mold chakra anymore
- Kakashi was died because he didn't have any chakra left.
Also, lee does use chakra.. the gates....

. Unless you are saying the gates don't use chakra either..