To me, the biggest mystery is why IT keeps tasking programmers with mundane and repetitive tasks when, unlike in other professions, the beauty of programming lies in the fact that you can abstract and automate the repetition.
Why we need million programmers building CRUD apps, why they don't have a standard already?
People keep talking about how the programmers often choose technologies to advance their own CVs, as opposed to doing what is the best for the company. Guess what, managers do analogical things all the time. It is the most reliable way to climb up the corporate ladder.
Same reason we have dozens of languages with very minor differences (not different paradigms), endless discussions on formatting despite opinionated linters/formatters existing, bike shedding meetings, and more.