This was my initial reaction too, but if you read the article, it explains:
She said male-born competitors had far more upper-body strength, adding: 'This is such an advantage, with the ability to cast longer distances than any woman. They have the capability of doing this while using more powerful equipment, such as stiffer and more powerful rods.
'Not to mention the extra strength she has wading in and out of the surf or walking through mud and rocks, and the stamina to keep this going for four or five hours.
'I have no grudge personally. This is an advantage to our team, but we find it totally unfair to other nations.
So yes, it seems that biological sex matters very much in angling, and this is very unfair indeed.