But he'd do it with a plan and would weigh in other options
He's always done that
It dates back to water 7 when he had Luffy and Nami sit down and made them realize situation and came up with a plan
There is no plan to be made in that situation. All the Straw Hats were separated. The execution date was announced. Had Zoro known, he'd have dove into the calm belt head first, and would have done whatever it took to be there.
He didn't know where he was. He didn't know where anyone else was. But you can bet had he known Ace was scheduled to be executed, he would have put his life on the line to be there knowing that's where Luffy would be heading, to support him and save a friend.