So you figure Zoom lied to ordinary users saving all the money and effort needed to do it properly, but they made sure to also build a special secure version for their "paid" users who have an official certification?

Let me suggest a question you'd be better off asking. Imagine that to your astonishment they just pocketed the money and gave you the same crap as everybody else, who do you think pays? Have you seen anywhere a pile of money you get as a prize if they'd just lied? No? Because there isn't one.