I have been in the arts for many years. That doesn't mean squat, I know. But I've always admired even the subtle changes made to the Healey through out its life and yes, in this particular case how the side profile modification of the 1962 to the 1963, or case in point, from side curtains to roll up windows. If it was intended to supplement or compliment the fender spear, other than an overall design, I would be surprised. My eyes always told me the chrome molding was a symbolic design and solution to the novel idea of adding roll up windows and also introducing more of a straight line design approach of that era (as also seen with American cars during the early sixties--ie. Caddy fins, transformation of curve lines vs. straight). This molding does make a powerful statement, a representation of the newly incorporated functional design of the roll up window as well as to maintain the flow of the door's curvy profile. I always pretended I was the designer and was put forth the challenge of, "Okay, to sell more cars we need roll up windows". Such a solution always involves maintaining that level of aesthetics we have come to love in the Healey and incorporating a new innovation and make it work, mechanically and aesthetically, even if it's an old idea.
Another test, envision removing the spear. And better yet, remove it visually from the 1962 and then the 1963. How would your eyes behave then about the molding's relationship to the spear (or lack of)?
That is my one opinion. Now, unless you can tell me this article or the designer of the Healey says the molding is a replication of the spear, then I will bow and step aside and say I am all wet! Otherwise, the Healey, which I have come to love just to look at, is like any good work of art where the picture does say a thousand words.