While there are some logistical issues at times (web browser saves getting eaten/progress lost on each update), I do agree I think it's quite reasonable and prudent to do so for shorter works, especially if they're free (you can already do pay what you want donations on those pages, albeit itch doesn't take you out of the way to see it).
I think it's mostly "laziness" and not enough of an audience bullying them for it like how they do in their demands for android builds.
It's not like those unique interfaces or code are always proper translated to android--some of them can get too many bells and whistles and the app will just crash, in my experience.
Long story short, go ahead and embed!