Interesting video.
That makes perfect sense: you have to earn a living somewhere. If this option had been available in the 50s and 60s it would have been taken up by plenty of players.
I have a neighbour who is a classical violinist, is lead violin for a fairly well known orchestra but still does pop sessions, tours and teaching to keep the wolf from the door.
Some great music will undoubtedly come out of this combination as well as allowing plenty of musicians to stay in the game.