[S4M]

Understanding the product doesn't require to know in what language it has been built (unless you're selling a library that can be called from a certain language but I don't think that the kind of product we have in mind here). What you say is akin to a car salesman knowing how the car factory works.

[toolz]

I don't think so. I think it's more akin to the CEO of Toyota having an idea how the car factory works and I bet you money he has a pretty good idea.