Zero-trust Security, it sounds good in theory from what I've read. But how's it being applied in the real-world?

I get that zero trust security is all about "never trust, always verify." But here's the thing – won't this mess with how easily employees can get stuff done? I'm also wondering how they're actually making this work in the real world. Anybody care to break it down for me?

cybersecurity employees good making security theory trust verify work world zero trust zero trust security