system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the point of Kirchhoff's First Law?

My exam starts in 3 hours so this is late but what the hell.

If Kirchhoff's first law says the current going into a junction is equal to the current coming out of a junction isn't that basically saying that I=I? I don't see how that's useful. That's just common sense isn't it?

How could this be applied and when is it actually useful because I really don't see this being important...
gpt
If your circuit splits up into different (parallel) paths, it tells you that the sum of the current in the paths will be the same as the current before they split up (and equally, the sum of the currents in paths that join together will give you the current in the section after they've joined together).