but those beings allegedly visiting the earth also want to share it with us to bring peace, equality, and sustainable energy to the planet and humanity.

This is wrong. VERY WRONG.

Let me explain.
Our technology is different from other civilizations' technology.
Science isn't even the same... and, if we go to other planets, we may find our technology doesn't work there.
What we consider the laws of the universe are actually only the defaults, in this area.

So, Tesla ran into this problem where humans could only accept so much change.
Tesla provided AC electricity. He could have provided free, world wide, wireless electricity
but humanity couldn't accept it. So, it did not happen.

AND, we will not have free energy until we will NEVER use it for war.

The aliens visiting us know this. So, they do not interfere in our evolution.
To do so changes many things, often invalidating the whole reason for starting a planet.

Thus, the aliens who may talk about selling "free energy" devices are bad aliens, that want to rule over and dominate us. If we take such a deal, we will forever be restricted in our growth.

And that would be so sad, because continuous green energy already exists, and will soon be available everywhere as the govern-cement controls collapse.