Within the rules of the game what has he done wrong to warrant a yellow car? Yes it’s unsporting but there’s no time scale to how quick you have to put the ball into the net is there. If a similar scenario happened and it were 0-0 approaching 90 mins you’d argue you’re running the clock down as an advantage. No different in my eyes to Lyle Taylor type of penalty where he slowly walks to take the penalty both are products of the modern day ego but both are within the rules of the game.
I don't.having said that it's because we are useless at doing it rather than passing any moral judgement.