It's human nature scaled up. Just isolate and zoom in on any single injustice or "how the sausage is made" scenario that you are privy to in your industry. Just a random water-cooler discussion about agreeing to a certain tech framework, or being 5% more likely to promote the project who's team is led by your friend, etc.

...And it gets worse and worse the higher I go in my career. Nothing is logical, nothing is purely organic and merit based. It's all marketing, promotion, personal-preference and plain old backroom deals. No amount of banging your head against any wall with logic or pros/cons can dissuade those in power from changing their mind, unless you force their hand with blatant lies/facts/bad-optics.