> then we should use strongly typed languages that prevent these bugs

So Typescript then? The most common recurring bugs on my team is front-end devs not knowing the shape or property names of types written by other devs (backend, other font-end, themselves a month ago). If we moved to Typescript they would get those little spellcheck-like underlines pointing out these errors before they attempt to commit, rather than customer's pointing it out.

Sounds like an argument against untrusted input, I just want Typescript so at least my own team becomes trusted input.