You are your child’s advocate in any level of planning meetings, the professionals do want good things for your child. But it is within the framework of what is best for themselves and their institution.
My son required quite extensive interventions when he was younger. In home therapy, early childhood, speech, OT, etc. We were so blessed that he made so much progress that his needs fell away. At one point, the only thing addressed on the iep was speech and he did not really need that. It was clear that they wanted to keep him in special education to keep that special education money.
Sometimes, it works the opposite. Professionals want to do what will save money and manpower by not giving your child what they need.
Sometimes the plan they want to enact is simply not a good one for your child. Even if they begin to cringe when they see you, you have a strong voice in the plan. If they are not working in the BEST interests of your child, there is a process and ways to fix that.