I agree that our complete inability to pass the ball from front-to-back is encouraging him to come looking for the ball in really harmless areas.
But it's not only that as let's face it he's been doing it for at least five years for both Man Utd and England. He is the only player we have with any quality and an actual pair of bollocks but there is a price in that it does unbalance us.
It should improve with some actual coaching though when we appoint a new manager.
I'd say Sigurdsson has quality and testicular fortitude, judging on his displays for Swansea and Iceland. He's just walked into a bit of a shitshow and not been able to show it.