Well my axerush usually gives me another civs land, my next attack with catapults gives me 1-2 more AI's land (if all goes well). If i somehow managed to not get iron in any of my cities then... well you get the point
(extremely unlikely)
And i don't use knights/crossbows a lot so i don't care that much about iron. (catapults beats everything
)
And as i said, i trade iron working later from a friendly AI. I most likely wont build more than 3 cities in my games (AI expands like crazy) so where the iron is is pretty much irrelevant for me. (i don't have enough time to plan for a decent iron city)
But this is still a game where multiple strategies work so keep doing it if you feel it's worth it. For me i prefer getting CoL up soon so i can hit AI's hard as fast as possible and keep cities. The economy is my problem in the start, not the military.

And i don't use knights/crossbows a lot so i don't care that much about iron. (catapults beats everything

And as i said, i trade iron working later from a friendly AI. I most likely wont build more than 3 cities in my games (AI expands like crazy) so where the iron is is pretty much irrelevant for me. (i don't have enough time to plan for a decent iron city)
But this is still a game where multiple strategies work so keep doing it if you feel it's worth it. For me i prefer getting CoL up soon so i can hit AI's hard as fast as possible and keep cities. The economy is my problem in the start, not the military.