Right, call me silly but I'm honoring the "Right-click->View Source" spirit here, I don't know about you but I feel more confortable knowing that my browser is downloading source code and compiling or interpreting than downloading some kind of binary to execute, even if you call it "intermediate code", "byte code" "almost-there-machine-code" or whatever, it's still binary stuff. I get your point though.
But. Flash isn't served as source, is it? And JS is often minified/obfuscated. Sure you can run that through a tool to get back the source (sans comments and long variable names) but you can do just that with MSIL bytecode too.