Earlier quoted context omitted.
Counterpoint: John von Neumann, arguably one of the greatest mathematicians of all time, claimed to do some of his best work in front of the TV. In my personal experience, I know plenty of engineers who don't mind noise. I think it's a personal thing more than anything and it's hard to generalize.
A TV is not calling you to chat every 15 minutes, or even talking anything important work-related to distract your focus. It's just noise, the same as working listening to music.
It's the difference between sitting next to a busker in the street for 8hrs per day and listening to recorded music on your phone.. in that it's a _huge_ difference.