[quote=@PPQ Purple]
Cool. Always nice to see this sort of thing taken to its logical conclusion. Anyway, next question. I read that you want us to apply science to the techniques. But like what does this extend to? Basically I understand how "throw fireball" is useful in combat and I understand how "use control over water molecules in somebodies body to make him boil and die horrifically" is also useful in combat. But I don't see how the former is overpowered and later isn't if you catch what I am trying to say in general.
[/quote]

The answer to that is simple, we live in a modern era where contemporary Ninjutsu is developed and allows you to do such things if you are skilled enough with your element.

It all boils down to treading and being reasonable on what you create.

It's not an issue, Tobirama did scientific methods like creating water without water source, Sasuke altered water molecules to freeze things like ice release but it's not as effective because Kekkei Genkai beats normal and mastered element.

Kakashi created purple lightning that bypass water and alcohol. This doesn't really impact fighting style but it's more of an originality and creative take on how you use your element.

And boiling someone's blood while possible is too advanced unless I allow it for plot reasons.