Doesn't change the fact ARC doesn't work with structs, and people actually allocate them on the heap, hence why on 2018 Objective-C got some support for also applying ARC to structs.
Maybe time to also review the WWDC session and the points made there?
I mean, sure, I believe you that you've seen this. But I've looked at quite a number of iOS/macOS projects and this was never a problem. Not even close. If anything, people were extremely hesitant if not actually afraid of using C features outside of the very basic ones like control structures, arithmetic and assignment.