She would not be ostracised by anybody. It's really up to her and what she chooses to wear. I guess she believes that in the end she answers to Allah. Some say religious advice on clothing is law, some say guidelines. I think her family/husband have agreed with this choice of outfit, as has the Qatar team she represents. Not a big deal. Remember, she's wearing it in a sporting competition, not down the local souq.

In all religions, the followers practise their belief in lots of different ways. For example, here in Qatar one sees Muslimas completely covered in black...face covered, black gloves on, the lot. Then you see other Muslimas in very figure-hugging outfits and lots of make up. It'a personal choice.
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Love is the answer...