Since ppl are having some trouble to put up with the stats on this. Take for instance this example, using naruto as base.
Think an ordinary guy on his 20's (without chakra) as someone with 180 vitality
A ninja would be much more tenacious than your avg random normal guy, probably with dun know, 300 vitality
ok?
How much vitality do you think madara jubi has? (dude had half of his body obliterated, and was laughing while healing him self IN SECONDS)
naruto sage mode?
hagoromo?
The numbers skyrocket. I think is what this manga tries to say. Normal ppl have normal stats, strong ppl have thousands? heroes milions, super strong shit have bilions. Something on this scale.