There are a lot of answers to that question, but they all summarize down to: you are the developer not the user.

* Perhaps those 10 lines execute faster

* Perhaps those 10 lines are exactly 10 lines, where jQuery is 2 lines plus a 65k library

* Perhaps those 10 lines work equally in multiple environments (node, deno, electron, browser) where jQuery does not.

* Perhaps those 10 lines sit behind a custom abstraction that actually looks like a single method

* Perhaps those 10 lines do something jQuery does not

* Perhaps those 10 lines scale and extend in ways jQuery does not

* Perhaps those 10 lines have a desired side effect