This is pretty funny.
The disclaimer only states that evolution is a theory not proved fact.
You are strongly against the disclaimer.
Above you state evolution is a theory.
You statements are not consistent.
As for your claim "the only explanation..." that is merely your personal opinion. Science should never deal in the realm of opinion. The Earth being flat used to be the only scientific explanation which was supported by the tremendous amount of objective evidence...see where that got us in the continuum of learning.
Since evolution finds its starting point at "hell if I know" or "a miracle happened" - I don't think it is time to turn off thinking and assume we have it all figured out.
Evolutionary theory is no more deserving of a disclaimer that any other subject taught in school. Why aren't folks clamoring for a disclaimer on atomic theory? Or Newtonian Physics?
As for your claim "the only explanation..." that is merely your personal opinion.
Kindly direct me to another scientific explanation.