If I'm the weirdo in the minority here, feel free to let me know, but I ideally switch between day and night modes almost daily on my websites and apps based on time of day. Here, it's usually between the White and Black settings. And while it's not a big problem by any means, navigating between 3 different pages (the homepage, my user page, then settings) is a tiny hassle that I feel could be avoided by placing the theme switching option on the homepage. I don't know if my usage of themes is normal or an abnormality, so I understand if putting it directly on the homepage isn't ideal if most users don't switch themes constantly. It would still be a fair bit faster if it were to be placed on the profile page somewhat similar to Reddit or YouTube (I'm not talking about the overlay, just moving the switcher from settings to maybe part of the User Menu).
I have noticed that most apps with a dark mode tend to bury it in settings, clearly indicating that it's designed to be a one time change, so again, maybe this is just a me problem, but I am curious on how others feel about a more easily on hand theme option.