Here's a link to a Janice Turner article in The Times about the Olympics being institutionally sexist. Unlike some of the woefully uninformed journalism we've seen this week she's been writing about fairness in women's sport for years.
https://archive.is/D7aNX
As well as the boxing issue she points out how women were banned from Olympic ski jumping until 2014 because of a pseudoscientific belief that emerged in the Victorian era that too much vigorous exercise might cause infertility in women.
If you think that this can't possibly be true, it's less than 20 years since the president of the International Ski Federation said that ski jumping is "like jumping down from, let's say, about two meters on the ground about a thousand times a year, which seems not to be appropriate for ladies from a medical point of view"
www.businessinsider.com/why-womens-ski-jumping-was-banned-2014-1
This history of the Olympics is littered with examples like that of women being treated as 'lesser' and having to fight the IOC. For example the men's marathon was first run in 1896. It took nearly 90 years for women to be allowed to run in a marathon event (the '84 Olympics in LA).
Janice also reminds us that all three medals in the women's 800m final in Rio were won by athletes with disorders of sexual development. Or intersex as some people still refer to them. They'd all been through an androgenized (male) puberty. Such athletes have physiological advantages that no 'XX' woman can gain without doping. It's bad enough that such athletes might take medals, qualifying places and sponsorship opportunities from women. But it's a whole different story when it comes to contact sports like boxing.
So YANBU OP.