I know exactly how and why it happens, too. It's human nature to want to be liked and be successful. It is human nature to go with the flow when funding is at stake. It is human nature to want to be accepted by one's peers and to impress one's superiors. Also, it is extremely hard to innovate these days when so many people are out there doing the exact same things as you are.
Unfortunately, all that behavior has taken humanity down some dark paths before.