@disabled >since no burger place would actually be any different than any other burger place
Bad assumption to begin with. Even if every burger place did this, they'd still be different because every chef is a bit different, they use different suppliers so the ingredients are different etc.
Like you can make the same burger at, idk, maccas and... Fuck knows what it competes with these days, and they're very different, because the buns are different, the patties are different, etc. But part of why those fast-food places suck is because they take great pains to ensure they have consistent output everywhere regardless of chef input. Normal burger places aren't like that, even if they share the name.
Other than that, yeah you're basically right, and it applies to places where stuff has to be cooked or whatever too; you can ask for changes at those places too, usually to a decent extent, but I find it too much hassle so I just don't go to them because I'm never interested in the presets.