Bad Company 2, trust me on this one. I really don't need "reload" and "use" actions bound to the same key. I absolutely love trying to disarm a bomb only to keep switching guns with the dead guy on the floor like I'm some clothes-switching fetishist.
I agree with the sentiment in regards to BC2 but he is slightly wrong...
Reload and use aren't bound to the same key. "Reload" is R, "use" is E. (Maybe they're the same on consoles but he's supposedly talking about PC games.) The problem comes when there are two things to "use" - like, as he says, disarming a bomb and switching weapon kits. I see your point about context and there is definitely a time and a place for that. However, in his example, if enough people die next to the bomb in BC2 it becomes almost impossible to disarm the bomb as there are so many weapons to pick up.
Even just giving the bomb-disarming action priority would fix it in this instance as you could then just do "press the use key to do use the important thing which is obviously the thing you want to do right now" as opposed to "mash the use key, repeatedly switching weapons until they're out of the way enough for you to start defusing the bomb by which time it's too late as the bomb has exploded or you have been shot because you were paying too much attention to the text on screen telling you what the button will do".
One "use" key often makes sense but if you can accidentally do something very different to what you are trying to do then the system is broken. At any given time a button's function should be obvious and if its function is something you will need to do whilst under fire at the trickiest times in the game then you shouldn't have to rely on reading the text on screen.