Why nobody wanted Courageous and Glorious as gunships

Without the naval treaties, who would want Courageous and Glorious as battlecruisers or coastal-defence ships?

Probably nobody: their limited gunnery arrangement, specialized shallow draft, and heavy maintenance demands made scrapping more likely than sale.

Their four 15-inch guns were divided between two twin turrets, leaving only two guns available in a salvo for ranging from either end. Their shallow draft was tailored to Fisher's Baltic concept rather than normal battlecruiser employment. Norway or Sweden might find the draft attractive, but neither had the facilities needed to maintain ships of this size and complexity. The Washington treaty did not create an overseas market for them; Beatty's support for carrier conversion was what gave the hulls a useful future.