This is Hackernews. Do things because you enjoy them? How can you enjoy life if you don't measure, optimize, and min-max every little thing, and write a little Rust program to track all the data you can post to Show HN? All food is fuel, nothing more, don't treat it as some experience to be savored.
But at the same time sometimes it is a little bit like that - some might like the consistency of caffeine pills, they sure were helpful for me. Others just won't like the taste of coffee that much, I know that I usually go for something with lactose free milk and sugar, otherwise it's a bit unpalatable and too bitter. I don't necessarily have a good taste in coffee anyways, the instant stuff is good enough for me.
Similarly, I'd like to replace maybe 10-20% of my food intake or something with powdered fibre and protein (or something else) to hopefully feel a little less hungry without resorting to high calorie options, because right now I'm getting fat and the hunger I feel is straight up stronger than my willpower at times. Vegetables alone or other healthy snacks do absolutely nothing for that, sucks to have to deal with that. Years ago I had no problem with "starving" myself when needed and maintaining whatever weight felt good, now I no longer have that ability as much.
On the other hand, calling people who enjoy the taste or the experience of getting a fancy drink "caffeine addicts" is unkind and we'd do perfectly fine without belittling others. If they like their fancy drinks, that's cool!
