“I had like the best customer support call the other day because their marketing team was not upset that their knowledge base wasn't getting indexed they were upset that it was outperforming their dub dub dub like people were getting to the documentation”

Public docs outranking your marketing site is a feature, not a bug

A public knowledge base ranks for long-tail 'does tool X do Y' queries that marketing sites rarely answer in depth. Prospects researching a purchase land in the docs, evaluate the product, and convert before ever requesting a demo. One customer's docs outranked their own marketing site — exactly because docs win the specific commercial-intent queries copy can't.