Why Does Photography with an iPad Look so Silly?

Nikon D4 + Voigtländer 125mm f/2.5 — 1/320 sec, f/2.5, ISO 100 —
map & image data — nearby photos

Why

does this look so silly?

(at the Kintai Bridge (錦帯橋), Iwakuni Japan)

What is it about taking photos with an iPad or other tablet that makes it look so stupid?

My iPad has no camera so I've never been tempted to take a photo with
it, but even if I could, I'm not the kind to take advantage of its
social-networking benefits (like immediate posting to Facebook or Instagram
or whatever the current fad is). So I'd probably not use it for photography
any more than I use my iPhone, which is to say, not at all unless it's the
only camera around and my quality threshold happens to be low.

But anyway, tablet photography looks downright silly. Why? Is it that we're just not used to seeing people holding up big boards to snap a
photo? We're used to small boards (phones), so that's why people taking a
photo with an iPhone don't look silly?

Practically speaking the resulting photos should be similar to those
taken with a phone, so I can't come up with a logical reason why I (and the
rest of the Internet) has such a visceral reaction when presented with a
scene like this. Any ideas?