[Closed] Children's rugby - scrum caps or not?

Next season my son leaves Tag rugby behind and moves into U9 'contact' games. There's no rucking etc, 1 tackler to 1 ball carrier then tackled player is allowed to place the ball for the scrum half. Think more league than union at this age.
The talk on the touchline is who is going to let/make/suggest scrum caps for their kids in the autumn.

Just interested to know what people who have been through this ended up doing.
I'm wavering between pros and cons at the moment.
Obviously the cap 'could' help dissapate a whack on the head and prevent some pain and bruising but it's not like it's a hard crash lid that can really protect the skull and brain from damage.
However, the tackling is controlled and I don't recall any big problems or injuries when I played as a boy...but caps didn't exist then anyway!

The whole head injury thing has become more talked about in recent years and this season it's all been going off with George North, Mike Brown etc etc.

Is some protection better than none, or will it help hide poor technique in the tackle and make things worse in the future.

Interested to see what people think, cheers.