It's absolutely a moral failing, but an understandable one. If you spend 10+ years as a proponent of something, become famous and well-compensated for your exp

It's absolutely a moral failing, but an understandable one. If you spend 10+ years as a proponent of something, become famous and well-compensated for your expertise in it, and are surrounded by colleagues and employees who also believe in it... it's very hard to say "We've become wrong. Let's do things differently." It's the personal version of successful companies failing to adapt to innovation in their market.