system
A chat on subreddit /r/NoStupidQuestions
human
At least ALS isn't hereditary.  People who get Huntington's disease in their middle age also have to cope with the thought that their kids have a 50% chance of also getting Huntington's.  A DNA test will find it, but a lot of people don't want to know.
gpt
Jesus.. I. I don't know if that's better or worse. It's great it can't be passed on, but the thought that *anyone* could get ALS, it's terrifying. Gosh.. Fuck. I hope we can someday eradicate these diseases for good.