The M-M experiment wasn't even an experiment.
I have written a couple blog post on it in great detail.

What you are probably never told is that the M-M experiment only disproved one idea about how the aether worked.

So, a barely passable experiment in only one aspect,
where they found something and called it nothing.
is used to dispel all of the aether models?

The laws of thermodynamics only work in an enclosed environment.
Such as a laboratory.

Soooo, if you are looking for proof, you don't do it in a lab.
And there is lots and lots of evidence that these are not actually laws.
They only hold for certain circumstances. But we do not talk about those circumstances (because physics discards metaphysics)

There are quite a few over-unity devices.

Free-energy devices are possible... except that can't exist because "the laws of thermodynamics"
Which world do you want to live in?

Thus, we come to the reason why T.H.E.Y. would try to keep us ignorant.
With free energy, we do not need the control structure.
We do not need to stay in cities.
We can go out anywhere and build a house.
We break free of the cages so intently built to keep us in, without knowing we were caged.