Very true, but the same is true in the bootstrapped scene. There are about 10-12 people who turn up in every podcast, repeating the same things.
These people (I wont name them, but you know how they are) are very good at promoting themselves, but that doesn't mean they are good at teaching others, or even running their own business (I have talked to the customers of some of them, and they are less impressed than the podcast listeners).
Meanwhile, there are hundreds of introvert types, who run their business quietly, who do a better job at running their business (compared to promoting themselves all the time), but who never turn up on podcasts.
Sometime ago, Jane Portman invited the founder of Calendly on her podcast. I found that episode very refreshing because a) It was someone I had never heard from b) He was actually running a profitable business, and he knew more about talking to real customers than a hundred other "experts" I had listened to.
Since Im in rant mode: Another thing I hate about podcasts is that no one talks about how hard it is (same with most growth hacking type blogs). It's always like, I put up a landing page, and six months later, I'm sitting on the beach with my new trophy wife and six million dollars in the bank. And I'm like, huh I'm sure there were a few steps in between you forgot.
That's why I like Ian/Andrei's podcast, they talk about the problems as well (when they get a minute talking about who hasn't played video games or watched Star wars ).
Ultimately, listening to too many podcasts is another form of procrastination.