I also found the comment you replied to a little unconvincing. The remark concerning scale in particular did not hit home, as I would guess the vast majority of teams are <10 devs which I would hardly call 'scale'. I left my previous role for several reasons but one was the constant "Microsoft does x".. Microsoft has 100k devs, we had 5. Not the same.
The point is that you can try, but IMO it's wasted effort. Commits are immutable and really hard to manipulate retroactively, and humans are guaranteed to make mistakes. Why put so much effort into trying to make your commits atomic, when it's unlikely that they ever truly are?
Sure, you can git bisect to the exact commit that introduced a bug, but that commit was part of a larger PR, and you probably can't revert just that commit alone. So what was gained?
