So, an unfit pregnant woman going out for the day shopping is not selfish.
A fit, healthy pregnant who jogs/walks for 6 hours is selfish.
She attracted attention because,sadly, the mantra is that you should give up your life when you are pregnant. Women who choose to remain active in pregnancy are sadly still viewed as nutters.
Her baby was a very healthy weight, strongly suggesting that the woman in question wasn't over-exercising when pregnant i.e. the blood flow to the baby wsn't at all compromised.