Who cares if it’s “too greasy”
It’s like Louis CK’s joke about people who complain about airline travel hassles. “You're sitting in a chair in the sky. You're like a Greek myth right now.” Even if you don’t subscribe to the notion that grease, for lack of a better word, is good, you’re still missing the big picture: you’re about to take a bite out of a 1,200lb animal, and there’s almost zero chance that, as you do so, a different 1,200lb animal’s going to take a bite out of you. In the grand scheme of things, that is a miracle. Sorry if your miracle is dripping a bit.
And anyway, greasy > juicy
Grease for the most part seeps from the surface into the bun for a more enjoyable, partially saturated experience. Juice, which thicker, fancy jobs tend to be full of, spurts out of the middle of the burger and onto your fingers and lap. Which is fine, actually -- anyone who hangs out in diners obviously isn’t particularly OCD about their eating habits -- but if you’re going to spill on my lap, you’d better not ask me for $17 afterwards.