It’s helpful to think of BS, incompetence, bad ideas and so on like mold spores. They’re always around looking for an opportunity to take hold. The harder it is to determine objectively who is right/wrong or who is to credit/blame for something, the more the mold flourishes.
I work in a creative, team-driven field with a lot of complex external factors and projects that take years to complete and are fundamentally subjective in quality. This is an incredibly mold-friendly environment. I try to counter this by basing my designs off of objectively-proven experiments and mechanics. It’s also incredibly important to spend time examining your creative process and designing improvements for it.
Finally, I try to remind myself that probably a good chunk of what I believe to be “best practices” are based on flawed assumptions or bad data. I hope every year to find out I was jaw-droppingly wrong about at least one thing. If I don’t, it’s not a sign of mastery: it’s a sign of inflexibility.