I think that "going" in this sense is originated as an abstract metaphor; its literal present-tense meaning asserts that one is moving in the direction of some

I think that "going" in this sense is originated as an abstract metaphor; its literal present-tense meaning asserts that one is moving in the direction of some destination, and will arrive at that destination in the future. If you say "I am going to Los Angeles", it literally means that you're on your way to Los Angeles, and will arrive in Los Angeles at some point in the future; so if the destination is a verb, you're saying that you're metaphorically "moving in the direction" of performing whatever action the verb describes, and that the action will therefore be performed in the future. It seems that this meaning generally eclipses the literal meaning, so we use different verbs to more precisely describe the act of literally moving toward a physical destination, e.g. "traveling".