I attempted a startup to fix meeting culture a few years back. Selling the product was nearly impossible. We got some nibbles and a couple bites, but it eventually became clear that the vast majority of companies just don't care about the problem. They'll tell you it's a problem (because it is) but nobody wants to write a check to fix it.
Like phishing training, but for meeting attendance. Fail the test and accept a decoy meeting and you must complete a round of mandatory training in how to distinguish a useless meeting from one that is worth attending.
I wonder if enterprises would buy this? Phishing training companies make a living.