I see where you're coming from, but I don't completely agree, because most people only have one monitor and it's the same screen they are going to use for browsing, productiving, gaming etc. etc.
For me, it's simply the fact that it's used as a desktop display that causes the issue, not specifically that it's for 'gaming' or 'professional' use.
To be fair, I haven't watched the video but if it is being marketed for professional use I'm assuming it's due to colour accuracy and contrast levels etc?
I reserve the right to look into it more and do a U-turn on my opinion