I understood you perfectly.  You rejected any distinction provided so I asked for a source of support.
[You are saying that whatever you produce at work is your personal property, which I disagree with]
No, I did not.  I said what you produce at work IN YOUR OFFICIAL CAPACITY is work product.  What you produce at work that is not IN YOUR OFFICIAL CAPACITY or OUTSIDE OF WORK is not work product.  Why do you think every legal expert projected Trump to lose a claim of executive privilege if Trump exercised it?  Oh wait.  That was just SETH RICH.
I expect you to still not get the distinction as you've failed to grasp my point after being provided numerous examples.  Here's another one.  I'm at work but eating lunch at my desk.  If I start playing a game on my smartphone and get the highest score in the world that isn't work product.  My employer cannot claim that accomplishment as work product even if he was my opponent/participate in it because it wasn't a product IN MY OFFICIAL CAPACITY.