I've never thought of it as a triumph of choice, "See, it's because I chose thus!"
And I've never thought of it as self-deception, which I think is what the article says. A poem is in some sense our own, but to the extent that you can be wrong about a poem, I think this article is wrong.
I think it's merely a wonderful acknowledgement that choosing different paths do make a difference, even when it doesn't appear to matter at the time. Frost's character wasn't making an obviously important choice between the paths. But way did in fact lead to way, and life was probably different, partially determined, because of this metaphorical inconsequential choice of direction.
My other favorite Frost poem is "The Hired Man," from which we get the line "Home is the place where, when you have to go there, they have to let you in."