[Clamchop]

I've noticed this, too, and have likened it to haircuts: If you gave yourself a haircut, you don't say so, because it inevitably opens the door to a level of scrutiny and criticism that it wouldn't otherwise.

People are just going to lie about using AI and honestly that's fine. An even older idiom is that you don't want to see how the sausage gets made. Not if you enjoy sausage.

[WhyOhWhyQ]

I don't think it's fine. Don't lie about your work.

[Clamchop]

Lie was probably the wrong word. Secrecy about how work is done is and has always been normal. Not saying anything at all if you're not obligated to is totally fair and, yes, fine. AI doesn't change that.