They want a fast return and no commitment, so they can walk away, getting what they want.
That's what I think about relationship out of wed-lock. I don't mean to offend anyone as I assume relationship out of wed-lock has become a prevalent and accepted lifestyle in the west. However, putting all the religious teaching aside, the lack of commitment and the ease of escape from responsibilities makes these kind of relationships questionable for me.
So far as the diagnosis of ADHD is concerned, I believe while there are some genuine cases of the disorder, many has to do with our lifestyle. Screen time has certainly added to the symptoms. Most of the things that we watch (especially the one's designed for kids) induce instant gratification and continuous hype of dopamine. When the real world scenerio fail to bring about that level of pleasure, symptoms like ADHD result.
Another problem in the present era is that we want a quick solution via medical treatment. Instead of putting efforts that work slow but demand steadiness, we want the fast result. Thus we go for medicine.
We all know medicne is an industry and more diagnosis bring more bloom to it, so they won't want to market the importance of diagnosis and treatment.