Re: General relativity
I'd hold on for a quantum theory of gravity before making that assertion.
For now, we view a force as a process which causes a change in momentum of an object. There are four such fundamental processes,* exchange of photons (electromagnetism), exchange of gluons (Strong nuclear force), exchange of W and Z boson (Weak nuclear force), and gravity. Yes, we model gravity as geometry. But there are well known problems with that model (dark energy, dark matter, closed time-like curves, black holes). If spacetime really does exist, it is probably stepped, not curved. And since the end outcome is probably the exchange of gravitons, we may not even need spacetime at all; we could exist in a sea of gravitons and distance be the measure of the mean number of gravitons between us.
We can also model electromagnetism and geometry and merge it with general relativity, but we don't trend to talk about electromagnetism as consequence of curved spacetime.
* Debate, should we include the Higgs as a fifth force?