I don't think meaningless is the right word. It would be deeply meaningful for a woman to know if a company is inclusive to her needs, for someone of color to know if a company isn't racist, etc.

The information is sensitive and damages companies reputation who are explicitly not on the list. Except maybe, these days, if a company wants to be known for its non-wokeness or such nonsense. Maybe one of Musk companies?

However, I do think this is an opportunity for sites like glassdoor.

If everyone is $foo-friendly, it becomes meaningless... it's mostly marketing at that point. It's the HR side of hot-new-shiny, where consulting companies have a product to sell even if it makes no sense in practical terms.