Take it to the adhd community then, diminishing a legitimate mental illness that wrecks havoc on millions of people isn't cute or funny and most definitely not a shower thought. It perpetuates the belief we can't focus for more than 10 seconds rather than having a fundamental issue with executive function. My ADHD (that you assumed I do not have) does not manifest by getting distracted, and summing it up as so is patronizing at best. This isn't an adhd space for people with the illness to try to cope with humor, it's for shower thoughts.
As somebody who has been medicated for ADHD his whole life, this dude has no right to be getting offended for all of us. Most of us aren't uptight assholes, and we appreciate a good ADHD joke more than anyone else.
Yet here you are speaking for most everyone! I appreciate good adhd jokes, this is not clever or thoughful or even accurate. Its in the shower thoughts community for christs sake. There's a time and a place to poke fun at trauma/illness and I'm sorry but this is just not tasteful.