reassessing your attitude about neuro diversity sounds like something that needs to happen regardless. But you can do this and still help your son speak more comfortably, but only if he is showing signs of frustration or discomfort or tension. the two are not mutually exclusive and thinking of acceptance as a last resort is not a useful frame. If stuttering is only okay if nothing can be done about it that means you place a high value on fluency when in time you may switch that to instead placing a high value on self expression, saying everything he wants to say, enjoying communicating, etc. And all of those goals can be worked towards and achieved while stuttering. The hardest part is finding a good therapy who knows how to help in that regard. But it's also not required for all kids. Some kids can figure that out being in the company of a supportive stuttering community. They're a bit too young now but FRIENDS and Camp SAY are two amazing organizations.