True, but that "one kind of rationality" might not be what you think it is. Conchis's point holds if you use "rationality" = "everything should always be taken into account, if possible" or something alike.

A "rational" solution to a problem should always take into account those "but in the real word it doesn't work like that...". Those are part of the problem, too.

For example, a political leader acting "rationally" will take into account the opinion of the population (even if they are "wrong" and/or give to much importance to X) if it can affect his results in the next election. The importance of this depends on his "goal" (position of power? well being of the population?) and on the alternative if not elected (will my opponent's decisions do more harm?).