It isn't the exact same but it's very similar.
Ok but similar isn't the same.
You can use two types of liquid smoke. Also at smoking temperature the fat dripping is not going to smoke. As for the rest of your paragraph it seems you attribute it to a certain je ne sais pas, which I obviously can't argue. Once again, I agree the process is different but my argument is that the end result is a product similar enough that it should be considered within the same genre of food.
If the process isn't the same then it's not the same food. I mean there are laws all over the world over this very thing. It can not be Kobe beef unless it comes from Kobe prefecture. It can't be Iberico Ham unless it comes from Spain and made with black Iberian pigs. Even if you took American pigs, and treated them the same way, processed the same way, it's not Iberico Ham.
If you're Sous Viding something it's not BBQing it, it's Sous Viding it.
Let's say I opened a BBQ restaurant and served pulled pork, brisket, and ribs, with a homemade rub and BBQ sauce. Like in most restaurants you don't see me cook it, only what comes out to the table. Is that BBQ? If you later learn that I used sous vide, an oven, a blowtorch and other tools but never a smoker, is it no longer BBQ? What would you call it?
It is no longer BBQ, and in fact South Carolina passed a "truth in BBQ law". Where places are REQUIRED by law to disclose to customers if their BBQ is smoked with wood or gas, violators face fines and Jail time. In fact there's a shit ton of people pushing for the same law in Texas.
I am all for authenticity, but it has a time and a place. If a new method to cook a food comes out that is either superior or more convenient I don't think it should be shunned. I know there are differences between sous vide and traditional smoking. I'm not arguing that there aren't. I'm arguing that it is similar enough that the method shouldn't be shunned and the two are so similar that they should fall within the "BBQ" umbrella.
For good measure here's a video of meathead working on indoor ribs.
https://www.chefsteps.com/activities/amazing-ribs-with-meathead-part-ii-exploring-indoor-barbecue
I never shunned your Sous vide, infact I said specifically "I don't think there's anything wrong with cooking ribs that way and I bet they're tasty as hell, but it's not BBQ." That's not shunning it. That's just saying its not BBQ. You can simulate BBQ flavors and the effects of it, but its not BBQ.
People, specially when it comes to food and how the process used to get to the final product are very specific. You can age a steak a couple of ways, and each one is called something specific and places are very specific on their method used. You can say they're similar enough to just call it aging, but people don't agree with that. Dry aging is one thing and wet aging another.
Barbecue means something particular, and while Sous Viding may get you very similar results, it is not the same thing.
Look go to any BBQ competition and pull out the Sous Vide, see if you get disqualified or if they agree with you.