On the contrary, the borrow checker is basically the first thing you learn about when writing in Rust as it's the primary "gimmick" of the language. Anyone writing a non-trivial program should have at least heard the term before, even if they don't fully understand how it works.

but I was so new to the game I didn't even know what those words meant

There's nothing wrong with being new to something. But you shouldn't be new to rust and releasing an app. Normally by the time you've written such an app you would be familiar with rust, but vibe coding allows you to bypass that wall