Society has built up a lot of systems to support people, to protect us from our environment and ourselves, and they've been incredibly successful; average lifespans have increased dramatically... literally by decades.
For the most part, these systems are built in response to and designed around how "we" expect peoples' brains work. If your brain doesn't work those ways, many of those support systems are unnecessary, ineffective, or worse still: harmful. There's also no doubt a bunch of systems that could be designed & built that could to help support & protect people with challenges that are largely non-existent for people whose brains work as we expect.
That the combined consequence of this is less that a decade of life expectancy for people with ADHD is actually quite remarkable, but let's not kid ourselves: we could be doing so much better.