I can't help but feel saddened that we learned how to code using View Source (indeed, it's a big factor in the web's success) and now we're trying to prevent others doing the same. Also, this seems like a surprisingly naive generalisation to me: "... a first measurement for preventing evil business guys from stealing your code – developers who can figure the code out are (mostly) kind enough not to steal it."
"Developer tools" is the new View Source. Browsers should really just redirect View Source to the live DOM view of their developer tools, that's what most people want from it.
The classic view source showing just text is a very powerful message: websites are just text[1]. As a young wannabe, it was very empowering for me to realize that all I had to do to accomplish my dreams was to open up Notepad and type some special text.
[1]: And images and videos and so on. That's not the point.