Same goes for highly regulated financial environments. If you work in banking you generally can't just FTX-and-hope your prototype, which is very much what GP sounds like they're advocating.

For starters you're going to have traceability requirements that can only be satisfied if you have a product requirements document and then often a software design document. Now you might well choose to manage all of that in JIRA and Confluence (or whatever) rather than sitting down and writing an actual document intended to be laid out and printed on paper but the fact remains the documentation exists and, indeed, is a must to satisfy compliance and regulatory frameworks.

As always, the domain you're working in and the organisation you're working for make a huge difference but, as much as there are plenty of places where none of this stuff matters at all, there are also plenty of places where it's incredibly important and that isn't going to change anytime soon.