"We" don't have to order anything but well drinks, but as "we" grow up, "we" often want a superior tasting beverage, and are willing to pay for it.
That said, I generally think well gin tastes better than Tanqueray, but if I want a gin with flavo(u)r, it won't be either. When I was a poor student, it was "G&T" and I didn't care. My "after finals" treat was a Sapphire, over, with a lemon. I couldn't imagine ruining that with tonic. (In the unlikely event that I'd order a G&T now, it would be with regular Bombay.)
"We" also, as we leave certain ages and enter other ages, decide that some of the alcohols without names we know, and others with names we know, no longer remain friends with various parts of the brain and other body parts. This is probably more true with Tequila than other distillates.
I'm not much of drinker of Whisky and its various types, but if I'm going to drink any of those brown spirits, it is going to have a name I know or is recommended.
And that, my friends, is how you know you're "all grown up."
