This is no way disregards the difficulty of living with an actually severe case of ADHD but is not what most of these people are dealing with.
EDIT: many seem to have misunderstood what I mean by this. I’m not saying these people are only claiming to have ADHD to use it as an excuse. What I mean, is that they may very well do have, and they’re using it as an excuse. Mostly to themselves.
I see you are getting a lot of flack but this point I think can be better understood if they think of the classic story about someone who gets messed up in an accident and does not have the will to do physical therapy because they tell themselves they just can’t do it. I do think you will get that with things like this. Still the answer is not necessarily to kick the person out of the wheelchair although in the movies with that trope you do see that.
I think people want simple explanations for the world around them but more often than not the truth is not simple. A person without ADHD can suffer from poor self-discipline. I don’t see any reason why someone with ADHD couldn’t. It doesn’t make them immune to the other personality quirks that people commonly have. I personally just don’t think that a diagnosis gives anyone the excuse to stop trying. Play with the cards you’ve been dealt.
Even in this thread there are gatekeepers implying that because I’m not a completely dysfunctional wreck myself I must therefor not have ADHD.