@seawulf575 No, it’s not, unless the unicorn has magic powers.
Imagine you’re stuck in a confined space (as we are, on Earth, but in this case, imagine you need to live in a barn with the horse), and you have a horse to maintain, which requires brushing, hoof maintenance, exercise, good hay which you have to pay a significant amount for and carry from a neighboring farm, clean water which you need to hand-pump and hand-carry, and which poops and pees all over the place you need to live. The horse is getting a bit old, and you don’t know how long it will last, and don’t see how you will be able to afford to replace it when it dies.
Then imagine a “unicorn” shows up, which forages from the forest and grooms itself, only poops silver nuggets, pees clean sanitary water with no odor, and will live longer than you will.
The old horse is the fossil fuel industry.
The unicorn is the possibility of, say, a clean fusion power tech, which safely and cleanly combines naturally super-abundant hydrogen into helium and produces unlimited energy and has only clean water and helium gas (which decays back to hydrogen) as a byproduct.
. . .
Abundant sustainable cheap clean energy might not make human greed vanish completely, but greedy humans can be dealt with, in a much happier scenario with abundant sustainable clean power, than with impending environmental catastrophes and an energy crisis.