The ratio of older women to men: historical perspectives and cross-national comparisons

https://pubmed.ncbi.nlm.nih.gov/10902048/

This paper seems to disagree heavily with you.

Just going by the abstract that you linked, that study seems to only relate to the past 100 years.

And extrapolating this to the middle ages and earlier:

In general, countries with a lower overall life expectancy had a lower number of women per 100 men aged 75+, while countries with higher overall life expectancy had a higher female to male ratio in this age group. A hundred years ago there were nearly equal numbers of women and men aged 75+ in many countries.

It doesn't seem to disagree with me at all.

"making it to adulthood" is different than "living longer"