>>191953 It was a different gen of reproduction. Not to mention that the birthrate was much higher than it is today and the marriages were more frequent and less likely to end in divorce. More people having more sex with their partners and having more births per household could theoretically result in a society where there are more beautiful girls in total, yes.
However, I think that what we see in this thread is the product of a town or community with a population of beautiful girls getting pregnant and giving birth to more beautiful girls. (eg. less immigration to or from the town.) Immigration can result in more girls that are more beautiful (theoretically), but in practice it probably never does.