Sara, you also mean well, but one may accept or not accept any and all peirushim. I did not agree that what Rashi was actually conveying was that Avraham Avinu first noticed after decades of marriage that his wife was a beauty. That is not the same as saying I think Rashi was mistaken, though being human, that is always a possibility. As I stated previously Ramban and Rashi are often at odds, and they cannot both be right if they have opposing viewpoints. yes, we do learn both viewpoints, and one may resonate (to use
your own word) with us more strongly than another. That does not make us wrong for feeling that way. It happens that the idea that I expressed did in fact come from my chumash classes during my yeshivah educational years. I had a rov who even asked the class that very question on the Rashi cited. We agreed that our own understanding of the Rashi could be structured in a less literal way. He explained to us that Avraham Avinu was not merely concerned with the physical aspects of life, but that his spirituality superceded it, and it was only when he realized that there are others who would not look at his wife with spiritual admiration, but rather only raw physical lust, that he needed to take precautions.
Thank you for your comments. Have a gebensched and healthy new year.