I would (and did) take the precautions I could- wear my seatbelt according to the advice, get dh to drive as the bump grew, drive steadily and carefully etc etc. Just the same as taking the precaution of not drinking whilst pregnant.
But the appropriate comparison flowers would be whether you embarked on any non-necessary journeys (and not just by car). Because any journey is a risk, and while seatbelts etc reduce the risk they do not entirely remove it. So it isn't actually just the same as taking the precaution of not drinking while pregnant.
As such, a person who is suggesting women abstain entirely from alcohol because that's the only way to ensure no risk should also do the same with other unnecessary risks. Particularly since we do know that a single car journey is a risk whereas we don't know that about a single small alcoholic drink.
Otherwise they're a hypocrite, and they only think women need to avoid risky behaviour when it's something they themselves aren't bothered about doing.
I'm curious as to what those who advocate drinking would do if confronted by someone who felt as I did at a party or whatever. Would you try to persuade a pregnant friend to have a drink?
I'm curious as to why you're not addressing this to the people on this thread who've already shown they like trying to tell other women what to do with their bodies, ie the ones telling others off for drinking. They're the only ones who've given any indication that they want to berate other women into using their bodies in the approved way.