Iron Golems don't attack creepers. Creepers don't attack iron golems either.
That's why villages often have cats in them. They chase away the creepers.
So even if Steve hadn't said anything, nothing would've happened.
This comic inspired me to try out minecraft again and I was surprised to find a golem wandering around the fortress I built and restored. Nice to see they're in this too and that it gives some context that they're kind of friendly protectors.
Golem, ngl, is a priority for me to obtain just gor the fact that I like their silent, strong and protective nature commonly portrayed in most games/stories.