>>938657974
Not American but yes, it is mental illness.
Time is an abstract, the only thing you need to know is the time to get places and when things happen such as bus times, train times, shops opening and work relative to the time now. All of these can be done roughly with a look at my phone, it serves no purpose having it on my wrist at all times other than an autistic fixation.
Record keeping is very important but I'm not an autistic record keeper being paid to keep records so I don't do it.
It's the same thing with everything. Exact measurements, exact weights and so on, unless you're being paid to care about the details, it doesn't matter. Similarly autists in the gym arguing over if counting the bar weight counts, it doesn't matter as long as it's relative to your other measurements. Seeking "perfection" in minor details of your life, is mental illness.