I have attention-deficit/hyperactivity disorder (ADHD). I am also late to basically everything. When you have ADHD, time management can be a challenge, and that can make working in institutions with strict attendance policies really hard.
Before (and slightly during) my time here at The Mighty, I worked for two major corporations, both of which utilized a point based attendance system.
Due to the way the point system worked, you could be punished and disciplined for showing up late by even a minute. Should that happen enough, regardless of the reason, you would be terminated.
Read more on themighty.com