This makes no sense at all. They have access to their best and most capable models before anyone else, and they can use it to make the job easier for themselves.
That's like as super-awesome of anything you could ask for: your job is to make a tool, but the job of the tool is to make it easier to do your job!
The problem is that OpenAI is also making tools with that property, as is Google, as is DeepSeek, as is xAI, as is....
So they still probably want people who are as skilled as humanly possible, and if the humans use the AI's skills instead of their own, all it means is that it's going to waste more time in the interview process or somewhere down the line.
Cause, honestly, if there's one thing the AI companies have plenty of, it's AI.
For everyone else who just wants to get something done, it's a bit silly to tell people not to use a key tool for the job. For AI companies, I can still see the point for the time being.