I don't think it's arrogance, I think you have far too much faith in large groups of people.
Of the 4.4 million software developers in the US, most of them produce really bad code and have a lot of wrong ideas about development and don't think twice about what they're doing.
Same with the medical field - rife with dysfunction and malpractice.
Pretty much all fields work like this as far as I can tell. It sometimes takes hundreds of years for new correct ideas to be actually accepted and integrated into the mainstream knowledge/practice in any given field. Most people have giant egos and are resistant to change.
Of the 4.4 million software developers in the US, most of them produce really bad code and have a lot of wrong ideas about development and don't think twice about what they're doing.
Same with the medical field - rife with dysfunction and malpractice.
Pretty much all fields work like this as far as I can tell. It sometimes takes hundreds of years for new correct ideas to be actually accepted and integrated into the mainstream knowledge/practice in any given field. Most people have giant egos and are resistant to change.