I very much understand hyperfixation and then moving on but that's not the example given. Buying a new toy, playing with it for two weeks then moving on is basic human behavior, not hyperfixation. Buying a blender then becoming so obsessed with it that you become fixated with it to the point where you think about it constantly, read, research and basically know more about it than could possibly be necessary then poof...gone, is hyperfixation.

Over diagnosing can lead to over correction. This is how we end up with basically normal people getting pumped full of meds that were not designed for them. Someone reads examples like the one posted, talks to a doctor and the next thing you know are on a cocktail of Adderall and antidepressants, which in turn destroys their ability to sleep, so then they also end up taking Ambien. So on, and so forth.

I am not minimizing the disruptive effects of ADHD, obviously. I am suggesting that EVERYONE take posts like this with a big grain of salt

Buying something new, using it then moving on is a neurotypical behavior.