Well, that's not becuse the poor guy is unable to multitask, but because at that very moment he stops multitasking

I never asserted that we don't multi-task; just that we are lousy at it.

It's less than a month since I watched a Michelin-starred and frequent TV chef, slice his thumb whilst chopping onions. Some poor sous-chef elsewhere in the kitchen dropped a pan--loud noise--momentary distraction--blue plaster. (And possibly an ex-sous-chef, but they didn't show that bit! :)

Like all analogies, it is flawed. And each of us chose to emphasise those bits which we thought best supported our point of view.