@Grace T.
You and I have talked about this before, but that story just kills me. So what if they screw up and a back pass turns into a goal? THEY'RE NINE YEARS OLD!! Nobody is scouting them for contracts!
Here's a counterpoint: My DD finally made a high level club team when she was in HS after years of toiling on B teams and Flight 2 teams from small clubs. That coach told the whole team that they were going to learn to play out of the back consistently no matter the early mistakes. He'd bench defensive players for booting the ball up the field and creating turnovers instead of playing safely back to the keeper. He'd yell at my DD when she panicked and booted the ball up field to clear it and tell her to calm down and play the easy pass. He told them that we were gonna score goals, and if our defense gave up a goal on a mistake passing back, our offense just had to suck it up and score two more. At the end of the first season, we made a great run in the playoffs and got into the championship game. We dominated possession, but gave up an early goal when a slow pass back that my DD maybe should not have called for got picked off and scored. The game went to PK's, and we ended up losing mostly because of that one mistake. Our team was devastated, but our coach calmly told the girls that, "We're going to lose some games that way because of our style of play, but I'm okay with it. We're not going to change. We got here by playing that style and we're going to keep doing it." Mind you, this was a championship game for an older age group with college coaches watching. So much more critical than a U10 league game. They ended up meeting that team a year later in a national tournament and crushed them. Fast forward to today, and my kid and her team is so much better off for that experience. Even when they are getting heavy pressure, they know how to react. I just wish my kid had been getting that sort of coaching at the younger levels. I can imagine that she'd be even further ahead if she had.