There are definitely people winging it but that doesn't account for the engineers that designed your iPhone, airliners, rockets that are capable of autonomous landing. Scientists that designed and built mRNA vaccines that use your bodies own infrastructure to synthesis molecules at the target site, managed to replicate fusion ignition on the surface of earth, smashed atoms together at multiple TeV.

Sure. Not everyone in every field is smart but experts are a real thing and they know vastly more about their field than you do.

I think when you achieve mastery in some field then it becomes a lot easier to appreciate this.

Maybe that is part of the problem. The vast majority of people aren't being offered the opportunity to achieve mastery and thus they don't have this critical grounding.