Are you dense? You do realise other people's experiences are literally out there right, are they all just lying, performance issues never happen cause of developer/management incompetency/tight deadlines? You've got an article that is literally based off peoples experiences and tells you why the software optimisation is having issues, hell the article is about a fix for performance issues that didn't even fix it

If there wasn't issue why did the developers have to release a fix? Explain that one are the developers lying too?