Well this is a loaded subject,,,,,
So,,, here goes nothing,,,,
Okay, as a parent it is a very very difficult to determine if your child has a real injury or just a boo boo.
As a Dr, they just go off what you say and put a brace on it, tell you to take time off etc...
As a coach, you have to try to determine if the injury is real or just a boo boo, (no one else is doing this, not the doctor and certainly not the parents). Parents, including me have a habit of believing and protecting, which is good right? Well,,,, that all depends,,,
Believe it or not, kids are taught pain tolerance from the parents. Yes pain tolerance is taught.... (coaches do it every day).
So if a parent, rushes to the aid of every little boo boo when the child is a toddler, then takes the child to the DR or Physical Therapist, every single time the child has an ache or pain,,, guess what??? That child is being taught that ANY pain is serious. Really,,,, it's that simple.
However being a parent myself, it is virtually IMPOSSIBLE to go against your parental instincts,

so yes an outside force (not a DR) is sometimes needed to question the validity of an injury or the severity of it. As a parent this may be offending to you....
Bottom line is it's very hard to determine, but the reality is,,,,, do we really have to go to the DR, for every little ache and pain?
Don't get me wrong and please don't post, "oh so we shouldn't listen to the dr"..... What I am telling you is, if you or a DR takes everything at face value then each and every time a boo boo occurs, then time off will be recommended.
Dr. are not mind readers, you give them your symptoms they tell you what they think is wrong and tell you to take time off or splint it, 90% of the time. And booting and casting things has gotten way out of hand in my opinion, completely..... Example: Kid goes to the Dr, because her heel hurts, but she is running and jumping just fine comes home with a boot on??????? Really.....
Here is a true and great story... I had a child years ago who had to skip sectionals because of a wedding. Well the only way to get into state at that time (rules are different now) was to get a Dr note...... So I sent a perfectly healthy child to the Dr, she told the Dr about some aches and pains, The Dr,,,,, gave her a Dr note stating that she had to take a month off!!!! I had to send the kid back to the Dr, to get note changed because they would not let her compete at state because the Dr note did not release her until after state! This actually happened, so keep that in mind when you go to the Dr. Was the Dr wrong? No, she/he was just listening to the child and told them to take time off based on experience..
So it's a hard thing to figure out, but ultimately it is the parents who are teaching and in charge of this issue, the coaches can only speculate and suggest...