But, my Fiend Pact warlock is directly linked to demons and has no problems getting a drink. And, again, you're focusing on a single example. There are about a dozen sub-classes that have gross physical changes. Do you similarly limit these as well? If not, why not? And, if not, how is that not a pretty clear contradiction? It's perfectly okay to be descended from a Red Dragon as a sorcerer, but, not perfectly acceptable to be descended from a Red Dragon as a dragonborn at the same time?
See, this is why you folks have been getting so much push back in this thread. It looks, from the outside at least, like you guys have actually given this extremely little thought, but, simply said, "Well, this is what I did back then, so, why not now?" with any apparent contradictions just conveniently ignored.