Or worse, it breaks at a completely different site you didn’t even touch, won’t notice and might also pass through manual testing (if that’s even a thing at you

Or worse, it breaks at a completely different site you didn’t even touch, won’t notice and might also pass through manual testing (if that’s even a thing at your place), and end up in prod. Sure, there are AI-based testing tools that check for frontend changes, but let’s be honest, they are very rarely used, if at all.