This is definitely tactical, he can close all day long if he needs too and has shown this previously.
I thought he pressed very well against Chelsea.
It’s abundant to see that the pressing all the forwards are encouraged to do, is to press the opposition players into a pass in a certain area which gives us the best possibility of winning the ball back or progressing play.
It may seem lazy but it’s tactical. I doubt someone who has Marcus’s personality ever thinks he’s too good for something, it may also be to prevent him from getting injured but I’ll go with the former.