To admit our training philosophies may be wrong puts us in a vulnerable state. Our old comfortable habits feel better than starting fresh with something new and foreign. We hate being rookies and often would rather train wrong, feeling at least like we belong. Power in numbers. You feel better doing things wrong, even if ridiculous or risky, if masses of others are also.
Pride is a hard thing to swallow.
To do so and render yourself apparently defenseless is true growth. You must make yourself vulnerable in order to take on a new challenge. Recall the first time you dead lifted. You likely had absolutely no clue how to do it and probably little confidence that you should even dead lift at all. And if you do, even less perform them properly.