[js8]

I am not asking anybody to be an expert in both (although I am sure such people exist, however rare); I am saying people should ideally have some skill in both. Also, people can collaborate, and learn new skills.

If you're bottle-necked by waiting for the users of your product to give a feedback, you clearly need to spend more time learning how to be a user yourself. Or hire people with some domain skill who can also code.