Well, if that were the case they'd get a private trainer at that age because at least according to what they told me at my coaching training, coaches aren't supposed to train individual skill sets-- that's what private trainers and parents are for. It's also why futsal is so great. To really get those individual skills in a team setting you'd need to do lines (so the coaches can see and correct each individual player)...and lines are big no nos in club soccer practices.It's not the kid, parents are worried that their kids missed the boat if other kids already get professional coaching at the same age.
Ian Feuer famously didn't take GK students until age 9. At the time my son started with him he gave me advice to hold him out of club (it rarely goes well with GK when they first start unless they happen to be on a winning team that will cover their mistakes but leave them little to do) and just keep him in training for a year (either leave him in AYSO or put him in some other rec or futsal). Didn't listen because my kid was fed up with his AYSO Extras teammates not wanting to practice and not taking it as seriously as him. In retrospect I think it was good advice.