My stars, what is your damage😭 😂 I said my opinion was unpopular and gave my reasoning for it, mostly because I can see it's not gonna win this poll and thought some might wonder why anyone would vote "no". I never said you or anyone else had to agree with me. An opinion is inherently subjective, but I love arguing about things that don't ultimately matter, genuinely I think it's fun. So please believe I am saying this in good faith and not to upset you—I assume you must also enjoy the fun of arguing, since you so thoroughly went through my points. If you actually are upset, please turn away now. I'm not here to make enemies. Just explain myself.
The first point: messiness. If you're gambling at your table with your cards and your chips and you don't care if it all gets covered in hamburger grease, or cheese, or condiments, you do you. Most people would not be so happy about it. You can't eat anything at gambling tables in Vegas, sandwiches or otherwise, so perhaps that is moot, but my original point in bringing up cards and burgers is that sandwiches got their name from a guy who wanted to keep playing cards and eat without interruption. He didn't invent the sandwich, but he popularized it by his habits. Burgers are inherently messy, and I maintain that you can't eat one and play games at the same time. Sandwiches, by contrast, are not inherently messy. Some are, yes, like a French Dip, or a Philly cheese steak, but that is a feature of a type of sandwich and not a sandwich by definition. Now you might say "well if you agree sandwiches can be messy and burgers are messy then that negates your whole point about burgers not being sandwiches", but just because things can share features doesn't mean they're the same. Buffalo wings are messy and you can even eat them with one hand, but that doesn't make them a sandwich either.
I feel I should additionally clarify why I maintain that burgers are always messy: it's because of the beef and, more importantly, the fat. When you cook beef, the fat melts, and it's gonna drip out of the sandwich no matter what (unless it's cold, but arguing that a cold burger isn't messy feels like needless hair-splitting because burgers are eaten hot). By definition, burgers are made of beef, and though you can make them with turkey or chicken or soy, those are a variation on burgers. And while we're speaking of definitions, yes, I know the dictionary says a burger is a kind of sandwich, but this discussion is about why I don't consider hamburgers to be sandwiches, not the dictionary. I am not trying to change your mind, or Merrium-Webster's.
Next, my point about a beef sandwich is thus: IF you were to describe a burger as a sandwich, it would be a beef sandwich. It's made of beef. If we're going to argue technicalities (and clearly we are), then you can't deny that I'm right about that. As for a comparison to tofu and edamame, honestly it sounds like you're agreeing with me. Something being made of the same base materials does not the same thing make them is the whole basis of my reasoning for burgers not being sandwiches.
As for the next point, of course bun sandwiches are a thing. I never denied that. Perhaps I thought the point was obvious, but I will explain further. Sandwiches are not defined by the kind of bread they're on, but burgers are. Sandwiches—even the specific kinds that are on certain kinds of bread—are flexible to the extent that bread substitutions can be made without changing the fact that it is still a sandwich. Burgers, by contrast, are always on buns.
An additional point I will add, because I think it's relevant: if burgers and sandwiches are truly the same thing, it would be reasonable to assume you can order a burger everywhere sandwiches are sold and vice versa. True, some places do carry both, but they are on separate sections of the menu, and not universally found at dining establishments that specialize in one or the other.
You can continue debating with me if you wish, because I am having fun and hope you are too, but you will not change my mind, because again: this is a matter of opinion, not fact. It's simply not that deep.