I think this is a common misconception. Vegans don't eat only vegetables, they eat every type of food, except animal products. It's very likely that most of the dishes you enjoy have a vegan version that tastes great. If you live near a big city, try out some of the vegan restaurants to see what chefs are able to do nowadays.
Also, tastebuds change and you'll eventually get the same steak dopamine hit by eating something else. I, for instance, used to hate Indian food, and now Chana Masala is one of my favourite dishes.
> I cannot even fathom doing that FOR THE REST OF MY LIFE.
That's not a logical way to think about things. When I go out for a run, I don't think "I have to run every day for the rest of my life otherwise it's worth going". I don't think anyone would ever exercise if they followed that logic.