I'm from the UK so the Arsenal point is well made.
In any season there are going to be games when 1 team hit's form and for whatever reason the other doesn't - Man Utd 6-1 with Arsenal a couple of seasons back. If one side has dominance why shouldn't they take it easy and just keep the ball, game won why waste energy they have another game in 3 or 4 day's theygo for more goals pick up injuries what a waste. In youth soccer if a team is good enough - and i have seen few who are - to keep the ball good luck to them. Soccer is an art and a skill to play, if Brazil keep the ball for 25 passes do we moan, if Tiger woods play's safe at the Masters do we moan, if the quarter back goes down on one knee do we moan!! no so why should we risk ourselves as professional players for the sake of more goals!!!!!