@viscount aero, you wrote:
If spacetime is a real object that can be bent, curved, compressed, etc... this means it is a form of matter. So what is it? Is it a solid? No. It's transparent and massless, a void. You can travel through it. Is it a liquid? No. Water is liquid. Space isn't. Space has no traits of a liquid ocean physically. Is it a gas? No. Freezing space if it were a gas should collapse into a solid form. But it allegedly keeps "expanding" like a hot gas escaping from something. So it's not a gas. Is it a plasma? No. Space is inert. It doesn't conduct electricity. So what is "space" made of?
The answers to these questions could scientists really have gained from the best of the numerous cultural descriptions of Stories of Creation - if interpreted in modern terms of "basical and principle elementary conditions; energies and motions" and not as "deities of this and that".
"In the beginning" cannot be taken as "a beginning" since the mythical and native concept of everything is cyclical, and thus no Big Bang here either. They all talks of "a latent stage of elements and their qualities" before anything firm matter and form is created. Here the stories of creation speak of eternal Primeval Waters, (CMB), and of infinite voids filled with these basical and fluctuatiing elements, where hydrogen and helium ("watery and airy elements") mostly fills up the vast void.
The next following mythical explanation deals with "the setting in motion issue". Here light "let there be light" = electromagneto-dynamics and discharges and cold and hot conditions = thermodynamics comes into the equaton. Then we have the aspect of "assembling and spreading" where both thermodynamics and electrodynamics can achieve these swirling patterns of "infolding and outfolding" formation.
And so on and etc.
For centuries we have been told by intellectually educated people who told that its all very complex - but the complexity only derives from the cultural and scientifical disattachment from Nature and its obvious patterns of formation everywhere.
Once we were told and learned only that an apple fell from the tree - now we also ponders over the natural motions of formations which creates the apple in the tree in the first place.
Life makes senses and who could doubt it, if you have no doubt about it. - "Grooks" by Piet Hein - My fellow Danish countryman and also a Natural Philosopher