It’s not even just that, humans a incredibly predictable and that predictability is able to be microtargeted based on trends and past activity of an individual.
I literally let years go by between buying shoes, no kidding. So I don't think that what you described would cover my specific case.
Especially out of the blue, and not shown ads for that at all before, and exactly around the same time when that discussion comes up in a moving vehicle.
(As an aside, and in case you're curious, when it comes time to buy new shoes, I usually buy two or three pairs of the same shoe, and then stick the other ones in the closet (usually buy at a really good sales price). Then when the first ones wear out I throw them away, and grab the next pair out of the closet.)