No, the origin of the spike protein is not from the virus.
The virus only evolved to mimic the spike protein we already use.
You do not understand what the spike protein is for and how it works.
We most certainly do have the spike protein and use it frequently.
The way the cells are regulated and the way cells communicate like when they are being attacked, is through exosomes.
{...
Exosomes are membrane-bound
extracellular vesicles (EVs) that are produced in the
endosomal compartment of most
eukaryotic cells.
[1][2][3] The
multivesicular body (MVB) is an
endosome defined by
intraluminal vesicles (ILVs) that bud inward into the endosomal
lumen. If the MVB fuses with the cell surface (the
plasma membrane), these ILVs are released as exosomes.
In
multicellular organisms, exosomes and other EVs were discovered in biological fluids including
blood,
urine and
cerebrospinal fluid. Importantly, exosomes were also identified within the tissue
matrix, coined Matrix-Bound Nanovesicles (MBV).
[4] They are also released
in vitro by
cultured cells into their
growth medium.
[5][6][7] Since the size of exosomes is limited by that of the parent MVB, exosomes are generally thought to be smaller than most other EVs, from about 30 to 150
nanometres (nm) in diameter: around the same size as many
lipoproteins but much smaller than cells.
[5]
Compared with EVs in general, it is unclear whether exosomes have unique characteristics or functions or can be separated or distinguished effectively from other EVs.
[1] EVs including exosomes carry markers of cells of origin and have specialized functions in physiological processes, from
coagulation and intercellular signalling to waste management.
[5] Consequently, there is a growing interest in clinical applications of EVs as biomarkers and therapies alike,
[8] prompting establishment of an
International Society for Extracellular Vesicles (ISEV) and a scientific journal devoted to EVs, the
Journal of Extracellular Vesicles.
...}
Exosomes have to be able to get into cells.
The way they do that, is by sticking their spike protein into an ACE2 receptor.
That opens the door, and the cell envelopes the ACE2 receptor, and what ever is putting its spike protein into it.
That is supposed to be an exosome.
But the point of a virus having a spike protein, is that it is mimicking the exosomes.
That is how the virus fools the cell into letting it in.
If our body ever starts attacking the spike protein of exosomes, then we die.
If all people end up like that because all people took the foolish vaccines, then all humans die and the species is gone.