Just because they don't care doesn't mean exploiting their ignorance is okay. I don't know that I agree with the GP that this is a targeted move to get AMP to slide under the radar, but if it is we should totally care. AMP undermines the fabric of the web. Just wait for the day that Google starts serving AMP for sites that aren't even configured for it. When they serve an AMP page, they are doing more than being a middle man, they are controlling the traffic and the display of the site, and the user is none the wiser. Google penalizes you for doing the same thing, specifically because it's nefarious.