There is no doubt there are customers willing to pay for higher level of service, just look at the stratification in the lodging market.
But airlines are different beast. While a few routes could support such as high end line (although nearly all attempts have failed). NETJETS is a attempt to partially serve a high end customers but not the place for great food or WW service.

An airline needs regular service, once-a-day high-end isn't going to cut. Needs to service a fairly large number of destinations. Needs connectablity.

Air travel is either a niche-market or a mass market. While regional carriers exist, they need volume and regional service is not what the high end customers.

People have been saying I'll pay for better service for 30, 40 years. Dozens of ventures have tried and have all failed. Baring some revolutionary approach, it ain't happening. That is what the market has decided time and time again.