I'll be the contrarian and say that I don't find anything wrong with this, and if I were a candidate I'd simply take this as useful information for the application process. They do encourage use of AI, but they're asking nicely to write my own texts for the application - that's a reasonable request, and I'd have nothing against complying. sshine reply above is coming from a very conflictual mindset. "Can I still use…
I imagine they wouldn't have a problem with using AI to proofread your responses. That feels like fair game.
But... it can't tell you your own thoughts. It has no thoughts. And if it did they certainly aren't your thoughts.