This would be a reasonable position:
"While the ternary is often clearer, we chose to sacrifice expressiveness and brevity for the sake of preventing abuses, which we found were all too common."
But that is not the claim being made in the FAQ.
> Thus all if and for statements also require {} brackets.
Indeed this rule seems to spring from the same philosophy. It is most certainly not a preference for clarity, though. It is a preference for consistency.
The philosophy is: "We're giving up expressiveness and brevity because in our experience most people can't be trusted to not shoot themselves in the foot."
This choice would be much more palatable if they were honest about it. But instead, they take the road of insisting that the verbose consistency is actually clearer, which it isn't, at least in many people's opinions.