Like I said, matter -> energy is easy, thats why we humans have achieved it.
But energy -> matter is so difficult it may remain a skill only gods can perform.

No, its not impossible to change the way energy exists.
It happens all around you all the time.

Example 1 :: Take a cigarette lighter, only contains "potential" energy,
stored as volatile chemicals. Light it.
Light energy and heat energy are given off. Did we create it?
No we just changed it from 'potential' to 'light' and 'heat'.
Nothing created or destroyed.

Example 2 :: You find a rock sitting on the ground.
(lets now call this zero energy)
Pick the rock up and hold it at shoulder height.
(your arm has now given it potential energy. Lets say 10 units)
Let go of the rock. It hasnt started to fall yet.
(the rock still has 10 units because of gravity, the gap to fall into)
The rock starts falling, it gets to about halfway.
(the rock now only has 5 units of potential energy, because it
is half as far from the ground. BUT it now has 5 units of
'kinetic' energy, loosely termed momentum)
The rock hits the ground, leaves a dent, and goes 'bang'.
(No more potential energy, cause its on the ground. No more
kinetic energy cause its stopped. Where did all that energy go?
Rougly, 4 units in 'mechanical' energy to make the dent,
5 units get converted to sound - kinetic energy of air molecules,
and 1 unit into heat)
Nothing created or destroyed.

Example 3 :: Take a chunk of Uranium/plutonium whatever, and weigh it.
Lets say 10kg of 'matter'. Wait 10,000 years, weigh it again.
Now its only 9.999999999kg of 'matter'.
The rest was lost as radiation, which is energy.
Nothing created or destroyed.

Or maybe we have different understandings of "energy"?