To be blunt, this looks like a feel-good piece from someone who spent an ungodly amount of time in shitty meetings but have no agency on the situation, will vent with diagrams as they can't tackle the actual issues of the org not giving a shit about their time.

If your calendar looks like the one the slides, you're spending half of your time reading meeting agendas and refusing meetings right and left, which is also should not a be good use of your time. At that point you're already trapped.

Sure, that mess was for comedic purpose, but the crux of the issue is usually not how shitty your meetings are.

It will be either coworkers looking at your agenda and deciding to add one more meeting to the pile and/or overriding the time blocks you've set up. At that point they already don't care about you, and your team is hell on earth either way. They might as well write bullshit agendas if that helps them.

Or your whole org just generates streams of group meeting, and nobody higher up seems to care about productivity. Which is also the hallmark of shitty org you'll be fighting at every turn to just do your job.

Or a mix of both.

Refusing meetings won't save you. You're still dealing with job nobody seems to care about.