re: If no one is willing to evaluate it, then---
How will the rest of the world know whether it is true or falls.
If no one is willing to evaluate it then the only way they could show everyone that it works is by making something useful that many people will purchase, but suppose they do not have the financial ability to do so.
It takes a lot of money to design construct and mass produce something, and that is especially true if that something has not existed before.
I do not know if their claim is valid or not, but if they have succeeded in showing that their device actually works, then why should not the operation be investigated by using scientific methods.