I know it's kind of a trend but I think that is the case because so many people identify with it.

I wouldn't have cared about the label itself it if wouldn't have come with a vast amount of knowledge and explanations for many aspects of my life. This is why I cared about this and why I talk about it with others, because deep diving into the topic has helped me learn a lot more about myself more than anything else in my life and it explains many of my interactions with others as well as other peoples behaviours.

And to be honest many of the struggles of people on the authism and ADHD spectrum are not really something that can be solved with typical self improvement tactics, it's something to manage or maybe to medicate, but if you haven't found out that you fit the label it would be impossible to figure this out.