[Qom]

That is not appropriate. I do NOT want to have to go to work at 7am, and neither do many people I know.

[rapht]

What difference does it make ? It's just a mindset.

[Zak]

It's a mindset or preference to the same degree that homosexuality is: https://en.wikipedia.org/wiki/Chronotype

[jsmeaton]

Whoa, I didn't know that was a thing. Now I've got a handy little reference available when the girlfriend complains that I "stay up too late" (past 10pm!).

[Qom]

Circadian rhythms aren't mindsets.