You're assuming that the probability of interception is 100% In reality, the probability of interception is miniscule, but the probability of speed is 100%.
These types of attacks have been hypothetical for a long time, but we're starting to see real world impacts of not using https, and they aren't trivial.
The Greek government inserting ads into that site is very low on my list of concerns, but the additional 200-400ms on the first page load is much higher up.
Am I correct in understanding your point as "there can be no conceivable case where two fewer TCP roundtrips would be worth the speed gain over the decreased security"?