"There's phenomenal evidence we experience every second that make the theories of Gravity, Mass, etc. the most plausible causes behind those forces."
No there isn't. The experience of things falling down is NOT a confirmation of the present theory of gravity.
"Evolution is not the most plausible theory for the origins of the species."
*The* species?
" The "proofs" are circumstantial where they're not pure inference."
Examples please.
You have a misunderstanding about what a scientific "theory" is.
Patrick Henry's list-o-links has some extended definitions, but the short one is that a scientific theory explains the mechanism behind a phenomena. We really don't know very much about how gravity works, I.E, the "Theory" of gravity. And what we do know is so very tenuous that it could easily be replaced in the near future.
There is the "fact" that gravity occurs, which we understand pretty well, as least up to a point. But the scientific "theory" of gravity is what we're still working on.
Evolution Theory is similar, in that evolution, like gravity, is a fact because it does occur (even the specious "macro" evolution that creationists object to). And there is also a "Theory" of evolution, in that we know quite a bit about how species occur. In fact, the Theory of evolution is quite a bit more firm than the Theory of gravity, even though we're still learning details about it.