The most dangerous phrase in the language is, “we’ve always done it this way.”
"Come on, let’s mix it up!" The heart surgeon says.
"B-but we’ve always done it this way!" The other replies, "this is how you replace a heart valve."
"That’s the most dangerous phrase in the human language!" The first surgeon replies haughtily as he inputs a fruit loop into the patient’s heart. "This will be his valve. He will be a fruit loop in a world of Cheerios."
(taken from this post on the experiments of Harry Harlow)
This is serious business, because this is a large part of how sexism, racism, homophobia, rape culture, ethnocentrism, etc. continue to happen.
Dude, STFU, fandom-universe. Not only did you miss the point so hard you landed three counties over, if it wasn’t for people who were willing to try new and different things in medicine-germ theory, organ transplants, blood transfusions, antibiotics, vaccinations-we could all very well be sitting in doctors’ offices with leeches on our arms to balance out the humors and remove bad blood from the body. Because it wasn’t until someone was willing to challenge those commonly held notions of what caused illness that all of those things were developed. Poor, poor example to try and contradict a very important point, and if it was a joke it was completely unfunny. -10 all around, the judges suggest you kindly try again.
Heart surgeons aren’t doing it how they do it because “it’s always been done this way”, but because it works. And they knows why it works. They went to school for that. They know why they’re doing every step and what would happen if they skipped one of them.
And guess what? When somebody comes up with a safer, easier, or more effective method of doing it? The surgeons are probably picking that new method up pretty damn fast.
(Unless there’s one or two who stick with the less effective method because they’re more comfortable with “how it’s always been done”, in which case “most dangerous sentence” still applies.)