MITM attacks aren't much of a problem if you are just displaying some static HTML from a random blog, can't show anything else, and the user has a large confidence his browsing history won't be used against him by any large internet party (any telecom, government, your hotel, etc, even the ones not on the obvious path).

I guess that last one is a pretty big dealbreaker, but I can understand somebody saying "it's just a site full of old jokes, I don't care about it".