In the third world, internet access is more common than you think... My wife's family gets more reliable internet and wireless coverage than they do electricity or plumbing. When I went down there, you could go to a textile shop or open air market and I'd pick up open WiFi hotspots..m
Not to mention that "first-world country where ubiquitous internet access via wifi hotspots has been implemented" doesn't particularly describe, say, the US very well. The picture painted to try to make these contrasts tends to itself stand in contrast to the picture that is real life.
Not that the over-arching sentiment of "you shouldn't take the existence of an always-available network connection for granted" is a bad one. It's just that saying, basically, "These devices aren't suitable everywhere; consider market segments that may be less mature than the big, contemporary Western one you're most familiar with, for example" is a little bit of a weird and not terribly convincing way to express it.
