As a tech co-founder, I thought this deck was spot on. Maybe it's because I've been through that experience that I don't feel threatened at all byt hat slide.
"Stop writing code/did you talk to your customers yet?" - he's so right. I've had to trash a lot of iterations of our code because we didn't heed (or grok) this advice.
I still think code is very important. But coding the best thing ever and it not being used is a nearly 100% waste of effort.
I can imagine that developers who haven't gone through such an experience might feel different, though.