There's probably another reason hidden in the first sentence, which is that there's a transition from building the product (engineering) to shipping the product

There's probably another reason hidden in the first sentence, which is that there's a transition from building the product (engineering) to shipping the product (marketing, customer development, sales) that requires different skill sets and experiences. Was just discussing this with a software engineer friend of mine who realizes that he "has no clue how to market my product the right ways."