Valve has ‘a significant number’ working on Steam’s visibility dilemma but says it won’t gatekeep games made with AI
(www.videogameschronicle.com)
If that were true then the labels wouldn't even be necessary. People could just tell. But they can't, hence the labels.
Who said anything about lying? Just don't fill it out, and ignore any accusations. They don't do it because they're embarrassed, they do it because irrational people have prejudices.