I almost said the same thing in another post, but thought it was too controversial. Kudos to you for saying it - I agree the mindset feels similar.
Same problem occurs with introverts and all the extroverts that want to cure us.
What is odd is that while at the office we're worrying about health insurance for trans individuals there's about zero awareness of discrimination over sleep issues and introversion.
What I would love to see is some company based in the west coast with UK/EU remote employees who started mandating 8am (PST/PDT) standup meetings every day to get sued by DSPD suffering employees and lose. HR departments might start taking notice if they started being vulnerable to lawsuits.
The person who was using the Facebook Chat status API to track his friend's sleep patterns comes to mind. But also, we're getting into creepy territory if a lawyer calls you and say: "hey! You work for BigCo and you're a delayed sleeper, aren't you? I know their work policies, have you had problems with that? Don't you want a bucket of money?"