You've never taken a job working in a language you don't know yet? Anecdotally this is a common thing. In fact, my most recent job hired me to write C# with nothing but prior Go/Python experience.
> This kind of structured approach has fallen out of favor because it's become more popular to hire javascript and react developers straight out of boot camp who have only been taught how to code one or two things.
This comes across to me as needlessly bitter to folks with less experience than you.