Correct. It's broken by default because you're the only user and worked on it for 10 minutes 5 years ago. Probably wrote no tests for it.
Compare that to something like jQuery where all the edge cases have already been accounted for 10 years ago.
Compare that to something like jQuery where all the edge cases have already been accounted for 10 years ago.
People who don't "over engineer" also don't track errors. So you might be losing a bunch of users because your website is broken on their devices, and you'll never know. You can't repro it because your locale doesn't match theirs.