Transcon prices are a fraction of long-haul international Polaris prices. The amenities are designed to cater to (and attract) higher-revenue passengers flying long-haul (who in turn are paying for the amenities provided through higher ticket prices).

Example - ORD-LHR 8hrs $4800. ORD-HNL lie-flat 9hrs $2200. Domestic flight is longer and far cheaper. Pretty obvious why UA isn’t going to provide the same lounge and in-flight amenities as the international flyer. Premium transcon prices not much different than the domestic example provided (and is often much cheaper).

Frankly, premium transcon flyers are lucky to get UC access and slightly better food with their lie-flats, but that’s more due to competitive route pressure than fares paid.