I think it is really hard for certain people to admit that there are multiple ways that lead to the goal and that those other ways (not their preferred ones) are probably just as valid. And when the choice is made not to take their preferred way they turn into net negatives because now they are going to prove their way was better by sabotaging the alternative. This can wreck projects quite handily.

The best managers build consensus and try to avoid people digging in behind 'their' solutions. This is hard work.

This is one of the hardest things to teach new developers doing code reviews: your way isn't better, it's just different. And, sometimes it may be somewhat better but not worth changing for working code. This is especially true when talking about clarity vs succinct.