Ask HN: Does energy slow down light or collapse the quantum state?

What would a cat look like in a perfect vacuum?

I am asking this because it dawned on me today that energy is needed to create mass.

So nothing can exists without energy. So there is no way to see anything inside a perfect vacuum since there is no energy. No energy, no cat.

And therefore, would this not mean that energy must slow down light, or condense either light or quantum waves?

Did the Big Bang spring, not from a singularity, but from a quantum field that existed in a perfect vacuum?

This would also explain why light is not seen in a vacuum, light will always act as a wave in a vacuum and never act like a particle.

Thoughts?