[skydhash]

You can prototype UX with a tools like balsamiq or taking photos of paper sketches with paper-to-app application. No need for code to share an idea. Especially from business to engineering or vice-versa.

Product Managers coding is like Developers writing marketing pitches.

[theK]

Why not? I've seen both sides working out remarkably well. It is much more of a mindset thing than anything else.