This is tricky. As well as my two autistic kids, I have another child who falls into this area.
First off, who has said there aren't enough "traits" for a diagnosis? I would be wary of a non-expert or untrained opinion on that.
This may be controversial but it's just my opinion. It is possible to be quirky, but to find a space where actually, your life is fine. Where you can meet life's expectations without great stress, where you are fulfilled socially and emotionally, where you don't feel "weird", misunderstood, or 'alien'. The diagnostic criteria do make it clear that there should be a significant impact on the person of the features that can be observed.
With my kids, two of them absolutely definitely would not have coped in modern life without their diagnoses. The third is fine. We have discussed with them that it's possible that at some point they may need to explore the idea further. They are fully steeped in the idea of autism as a neurodivergent brain type so I don't think it would be as scary a decision for them as for some/Many if they do decide they need to pursue it further.
My thoughts on acceptance and "overcoming issues" - I think every child needs to feel loved and accepted in their family. That doesn't mean that we don't teach children how to manage big feelings, scale the size of a problem, gently challenge their anxiety. It's just that is done through discussion, modelling and education rather than assumption of ill intent or malice, shaming etc. I don't really think that's so different in autistic or non autistic kids. It relates to a question someone made earlier in the thread, which I haven't got to yet, about whether you should discipline an autistic child. My answer is, same as any child, it depends what you mean by "discipline". I firmly believe that kids almost always do well if they can.