Are you a doctor? Expert coach? Children's psychologist? Or just an all around know-it-all?
I hope most won't listen to the arbitrary age 11, because if you put your 11 year old in tackle (which would be either the 85lb or 95lb division depending on weight) he will mostly likely quit after the first year...because he will be a first year player taking hits from boys that have been hitting for as many as 6 or 7 years...and that hurts! It's not just learning to hit, it's also learning to take a hit. I'd rather start out with a 65lb six year old than a 110lb twelve year old myself.
I'm sure you would rather have a 65 pounder hit you.So how do you know the children would quit,what facts do you base this on ?I for one believe your Doctor is an idiot....what do I base my info on talking to many Doctors not just a family practitioner.....playing (and coaching) football to an extremely high level.
So your saying at the age of 11 is to old and that other kids have been playing full contact for 5 or 7 years....so they start at 4years of age???
Parents find a real doctor ...one that will tell you that a childs skull is not fully formed and head trauma is 10% more possible at an early age same with a childs bone development.