Three buttons mice have been the standard for well over 20 years. I'll give you that when blender was first released, three button mice were not common.
Those assumptions are only crazy if you're an Apple user or a laptop user who uses a touchpad to 3d model.
Laptops have been outselling desktops for decades, and the idea that Apple users are some quirky tiny minority has been false for just as long.
Blender’s UI just makes bad assumptions.
As a tangent, the single greatest thing about my Lenovo laptop that I was not looking for when I bought it was that it has three physical buttons for the touchpad(or that pointer thing if you use it). I love X11 style middle click paste. So that middle button elevates it to the best feeling laptop I have ever used.
A note on that pointer thing, I don't use it much, instinctively going for the pad and as such sort of dismissed it. Until I was trying to use the laptop in moving vehicle where the pad was useless due to bouncing but the pointer, rock solid. I totally get it now. lesson: Touch screens sort of suck anyway but are really terrible in moving/bouncing vehicles.