You've missed the point. The argument is that eventhough aiming for FB scale is absurd, some considerations should be taken under consideration from the start.

You've missed the point. The argument is that eventhough aiming for FB scale is absurd, some considerations should be taken under consideration from the start. We're seeing YAGNI-style arguments being abused to sell the idea that just because it's absurd to think 10 steps ahead it's also absurd to think 2 or 3 steps ahead, which makes no sense at all.