I personally like to descirbe myself as tolerant. Not exactly progressive, but I very much see the struggle some people live with and so I decided that not being hostile to anyone is the least that I can do in case I don't just straight-up support some causes. I had to get this clear, because my opinion doesn't exactly match with the one detailed in the post or at the very least I find fault in it's reasoning.
The problem is that all the "genetic advantages" that make someone a good swimmer for example, are all unrelated traits, that are not really rare in people, it's just that it's quite rare for them to all be present in one person who then also goes off to be a swimmer. Testosterone on the other hand is a single hormone, exceptionally important in becoming an outstanding athlete and for that precise reason it's considered a performance-enhancing drug. If you look at it this way it's not that hard to see the problem.
Being more muscular certainly is an advantage. Being taller also is. Longer arms also are. Lower body-fat percentage also is. Better stamina also is. Better agility also is.
Any boxer you pick randomly should be expected to have one or more of these "genetic advantages", but all of them, resulting from a single condition is quite a different situation. Elevated testosterone levels are a single cause for developing some of the most important traits of a dominating boxer and so someone with such an advantage can't be considered a freak of nature in the same sense that someone like Phelps can be. There isn't a "swimmer hormone" that magically gives you all the advantages in swimming, but there is a "fighter hormone", that does in boxing. I personally don't think that Khelif could be anything other than a women. I just think that her body happens to overproduce a literal PED and that's a problem for anyone who wants to go up against her or those that want to see fights that are more or less determined by technique.
Now for solutions and as far as I see there's only one that doesn't involve excluding her from boxing. Simply put her and anyone with similar conditions in a weight class based on their muscle mass and not their actual body mass. Moving her one weight class up for example would at least mean that her opponents have trained with punches of similar force to her's, something that the lack of seemed to have been a problem for her foes in Paris. She would still have an advantage in terms of speed, but she would pay the price of having less fat for impact absorption. I think that would be a win-win scenario.
Thanks for coming to my TED talk.