Winston, the point of the Apple Watch's prompt is to try to make the wearer of the watch healthier by encouraging them to be more active.
The point of the stand feature is to (exactly as it says on the tin) to make you stand and move around for at least one minute, every hour for 12 hours each day. Why on earth would you think Apple would put up that message if the intention is something different.
Standing (even relatively immobile) is better than sitting. (Feel free to read the medical studies.) And, moving around (even on a treadmill) is better than standing.
That may be true, but Apple are giving you credit for moving around not just for standing, that's how it is (and quite rightly so). I'm sure that sitting at a desk all day is better than lying in bed, how about Apple give you credit for getting out of bed.
The users in this post are merely pointing out that the sensors on the Apple Watch can't detect whether your standing or moving if your wrists aren't moving (i.e. on a desk).
No. Most (but perhaps not all) are wanting to deceive themselves, they want to be given credit for standing. Whilst a standing desk might be a little healthier it's not healthy enough, they need to move.
I very much doubt even sitting at a desk, that your hands aren't moving at all and yes the watch can tell the difference between light movement at a desk and movement due to you moving around. Incidentally I'd be very keen to see anyone move around whilst not moving their wrist because they are on a desk. 😁
Therefore, even those people who are walking miles on a treadmill at a standing desk are getting the same "encouraging" prompt to be more active as those who are sitting like blobs. Therein lies the irony.
No, I believe the irony is that you are happy to say anything without testing it. Spend an hour on a treadmill, you'll find you are given standing credit.