I think "selfish perspective" is overstating it. He offered his opinion on how it works for him in a way that addressed your question. I'm surprised you didn't at least acknowledge all the things he pointed out.
You mentioned the other phones have "value added" like proprietary cloud and email. I'm trying to figure out how anything that's proprietary is an advantage, let alone those two things that BB10 can do seamlessly without being proprietary. Nothing touches BB in handing email. Nothing. I've switched to Outlook to replace BIS and it's seamless. And for cloud, I've got 4 cloud services I can peek at (plus my own computers at home) with just a touch; no browsers, no special apps, no signing in, it's just there all the time.
I have no idea what you're talking about when you said he's in the same boat as BB leadership. What do you mean?
And why do you think they "wonder" why they barely sell any devices? Perhaps they know, they just haven't figured out the solution yet.. (which is basically to make one million native apps from scratch and then spend 10 billions dollars that they don't have to advertise to the world and educate them on what they don't know).