Phileas Fogg Alcohol is restricted on flights due to cost and for the PAX's own comfort and safety. Your suggestion that carriers go back to the 'give them all that they want' is strange. Once you have had a seat neighbour who: Boards fairly sober but already 'started' and then proceeds to get drunk, to the point where they wet the seat in their sleep and then, upon waking, are violently ill all over you and your children ... perhaps you will see the problem. Not to mention the difficulties presented by these people should an emergency occur.
I am not unsympathetic to those that are frightened of flying. However, I am more frightened of my fellow SLF.