A lot of those things are not unique to ADHD but we experience them much much more often and those experiences are also much more severe than the average person's. Someone shared under one of the posts here the quote "everyone pees but if you pee 60 times a day you need to see a doctor". I butchered the quote up but it should get the point across.

It's also worth to note that people with ADHD tend to stick together (or at least I have heard that pretty often back on r/ADHD) and ADHD is mostly genetic. So there's a chance that some of your friends, wife, and family ineed have ADHD but I'm making big assumptions there.

It's a common issue in psychological and medical circle's that you can self diagnose as having things when learning about symptoms for the first time.

Usually the difference is "everyone does this from time to time... People with syndrome Z, do this all the time"

For example, everyone is late to things or loses their phone/wallet occasionally... I lose my phone Almost daily and am more often late that not, even when I prepare well in advance.