This was a drill, not an actual game that was lost 0-10, right?
I can see a lot of possible purposes. I think my daughter's team (U11 girls) does something like this.
For one thing, my daughter likes both offense and defense, and likes playing pick-up games with fewer people where she's not so constrained by a specific role. Where she can be all over the field. This improves her skills overall.
I'm certain that her team does a drill where one person has the ball and tries to keep it away from the WHOLE rest of the team. Then whomever gets the ball has to keep it away from the whole rest of the team in turn.
Then there's another where they stand in a circle and pass to each other, and someone in the middle tries to steal it/ gain possession. If so, the person that she stole it from is then in the middle.
All the same idea of working on ball handling skills, accurate passing, etc.
Especially, this drill seemed to be about stealing the ball from the other team, since the coach would start things over again once that was accomplished.
If those three boys tend to not get as much playing time maybe the coach was making sure that they had some extra practice time to work on their skills.
I really don't think 0-10 matters in that context.
Did you have the sense that those three boys were being shamed? What is your concern exactly?