No, definitely not. These are specialist surgeons who may not focus their practice on children, but certainly can provide care for children.
These would usually be children who are older, like teenagers, who don't have comorbidities that would require the care of children's specialists. These would be children who need hernias fixed, gallbladders removed or some minor orthopaedic surgery. All of these things can be safely and effectively done in the community if the community hospitals are set up to provide care and the providers are incentivized to care for children.
They have long wait-lists of adult patients. Quite frankly, the fee guide for a fee-for-service surgeon will not encourage them to do a minor procedure in a child if they have the option of doing an operation in an adult.