Not because it was easy. Try not to forget how hard the Kennedys fought that OK. And how they tried to manipulate the Corp of Engineers to prevent it.

And, it was Martha's Vineyard

But, to put a point on it, the energy from the windmills pales to the energy from the oil well involved in the spill. Plus, when it was to be done, no one would have seen it was even there.

We can't power our world with windmills. We can't power our world with biodiesel or ethanol. The oil will run out and so eventually will the coal.
There are vast reserves of natural gas that will help. But they too add CO2 and are somewhat finite. Make all the laws and rules you want, won't change one simple truth.

Man will burn it all!

The only viable power source we have, with which we can currently create more power than we will need or use in the foreseeable future is nuclear.

And we aint going there.