I have said mild is how autism is how it is perceived. Not how it is experienced.
By this do you also mean that perceived by the person who experiences it is equal to being how the person experiences it?
To be diagnosed as autistic you have to have persistent differences that cause clinically significant impairment in functioning, and that are present from early development.
They only have to be present causing significant impairment at the the time, with evidence they existed before and have existed for some time. Once you have the diagnosis you have the diagnosis, it never goes away. We have already established above that many higher functioning people can get themselves into jobs and lifestyles that suit them and can be mildly impacted in their own estimation at that point.
I would also suggest that once they have a diagnosis and understand their conditions, many higher functioning people will make lifestyle changes that mitigate the bad effects.
It's also been reported over and again above in this thread and on others that the condition can vary in any one individual so that they can be mildly affected for years and then be triggered into a serious deterioration.
We have already, I believe established that expressing suicidal ideation would give you a positive on "significant impairment" no matter what the other impacts on your life were. Interpretation of "serious impact" is so open to interpretation by the clinician that I find it pretty useless to keep pointing out that's the definition.
I have an ADHD diagnosis from an NHS adult ADHD specialist psychiatrist where he also made the judgement that it had a serious impact on my life. Yet I would describe my own presentation of ADHD as mild because I managed to create a lifestyle that plays down my weaknesses and a career that played heavily to my strengths, without prescribed medication.
I don't understand how you can't see the damage it does in the wider community to insist that everyone who has an ND diagnosis is living with serious difficulties.
And even more damage to do as others on this thread have done and insist that nobody who is NT can possibly have it as bad as they do.