You can't look at just one risk and say it's not worth it.
Like everything else in life, you must weigh all the risks and benefits.
Untreated fever also carries real risks - neural tube defects, congenital heart defects, orofacial clefts, miscarriage.
You need to treat fever, and NSAIDS have greater risks than acetaminophen.
It's irrational to let a minuscule and unproven risk dominate the decision when the other side of the balance has more evidence of larger risks to weigh.
I didn't mean to say it should never be taken. Sometimes medicines should be taken that have risks for the baby. But it shouldn't be taken for minor headaches and aches and pains like it can be when not pregnant.
To be fair, at least in the US, doctors tend to be overly cautious when it comes to pregnancies. The bar for proven safety for treatments tends to be a bit higher than for non-pregnant people. "We haven't proven anything bad" is usually not good enough.