Gravity and gravitation are different, yes, but closely related cousins. Newton's measurements and formulae are inaccurate enough not to be absolute, but accurate enough to be used casually. For large-scale measurements we utilize Einstein's universal gravitation and special relativity (it's much more precise).
Gravitation, however, does not do much to help FET. If anything, it helps RET, and discounting gravity as a whole while embracing gravitation is a faulty line of logic to take. Gravity was useful for it's time at describing the universe, and is still useful today, unlike the selective force of Dark Energy.