This is something I've learned especially at work - charisma almost always wins over competence, unless you're speaking to other experts in the field. I've seen people spew absolute meaningless bullshit to audiences of hundreds in a field they should know at least a bit about, these are not exactly laymen. They will eat that shit up if the person speaking is charismatic and confident, and they'll clap like it's the most enlightening thing they've ever heard.