@zeccano No you seem to be missing what I just said.
No one claimed it is made of casio watches. We create names for what we know and what can be proven by math, but thats it.
We define waves as things with certain mathematical properties, if something is shown to have those properties then it is a wave, at least until someone can prove otherwise. Any interpretation beyond that, if not shown directly by math proven to be true, is not part of the theory but rather just ones personal mental framework used to understand the theory.
More importantly you claim things dont get heavier or change size relative to the observer when they have velocity.
We can show and prove this isnt true by experimentation, by mathematical equations proven to be true. Whether you think it is made of fairy dust ior perriwinkles is external to any such theory.