The issue is, it can remain premium only as long as it is exclusive to some extent. While yes, ideally everyone should get good services, it’s the numbers that’s a problem. There’s a limit to which lounges can up their game, and they should, but if everyone has access to the lounge and a free langar, the public areas in the airports will be empty and will appear better. It is like saying why should economy passengers not have the comfort and space and amenities of business class? It’s not being disrespectful for the economy passengers, it’s just that business and first have to have some amount of exclusivity and if entire flight is made business class, either services of business will go down in quality and experience or economy passengers will no longer be able to afford tickets as they will become expensive