Harlington....
Your choice not to drink alcohol is simply that...your choice. It is customary in many western nations to have a glass of wine with a meal hence thats why airlines do it. The service is a meal with your choice of wine!
The airlines are in turmoil at the moment, they will not invest in new equipment to suit one crazy complaint from the single voice who is offended by being offered wine. Your letter will go unactioned. You will have waisted your own time and that of airline representitives which could probably be put to better use.
Sorry to sound harsh but I dont believe in beating around the bush! My top tip for you...lose the chip on your shoulder, lighten up, be grateful that you are on an airline that hasnt fallen into the rut of charging for everything onboard and perhaps bring your own choice of drink for your dinner onboard with you, I am sure you could pick it up airside in a shop!