Firstly, how many people have access to such equipment? Lots. There are such a vast amount of people working in an area like physics that if something wasn't true, we'd know about it. Unless you're suggesting that every single person who works in physics today is in on some form of conspiracy?
Science is not a fascistic monolithic institution. Dissent is scrutinised, not crushed. You cannot be seriously entertaining the idea that every single physicist it either lying or ignorant about wave-particle duality. There's are tens of thousands of people working in the field of particle physics. If it wasn't a true reflection of reality, this would simply not be possible.
How do we know that physicists aren't lying or deluded? Because we see evidence of it in every day technology. If quantum physics didn't work, neither would your computer. Or your strip lighting. Or your hospital equipment.
Name one piece of technology built on fringe or pseudo science that actually works?
(Clue: there isn't one)
Nope, sorry, this is called special pleading, and is a logical fallacy. It isn't accepted as a valid argument. If something exists, science can measure it. We can accurately describe particles so small that we would never be able to actually know they existed, and yet much of today's technology relies on what we know about the electron.
Saying "science can't measure this", is a cop out. Pure and simple.
That's not true at all. Science is about learning the mysteries of the universe. Nothing would change the world more than discovering something like psi actually exists.
The problem is, at a very very basic level - and I can't stress this enough - there is no evidence for psi - there is nothing to investigate.
You really, really need to put some time in learning about how science as an industry works.
By misunderstanding my point you've illustrated it beautifully.