Assuming that Ive even decided the precise antenna gaps location, if he was 100% unmovable in his design explain the 4S.
Jobs was too controlling to give Ive complete power at that points, and the idea that Ive had complete power at that point, and was unmovable in his decisions, runs contrary to the idea that they worked as a team balancing each other out.
The reality was that Ive wanted to keep the exposed antenna design but instead of looking for a radical solution like moving the gaps, which would have been acceptable in the same way that they both accepted an easily scratched plastic bottom on the first iPhone because it was good for reception, the engineers threw up their hands and claimed the issue was unsolvable.