I have stopped believing anything doctors say is pain free or "only a little uncomfortable" for women. This means it is pain free for the doctor. I have had "pain free" procedures be excruciating which is worse when they don't tell you and you aren't expecting it.
Yeah, that line is the bigger load of bullshit than even David Cameron could come up with. I tell them, too, 'Sure, it won't be at all for you, but it's physically impossible to discern pain in a body besides your own so probably best not to use adages to that effect,' and they usually shut up.
I don't trust most HCPs any farther than I can throw them, which is nowhere, but hey, they don't trust patients, either (hence not believing you when you say you don't drink or drink a bottle a week, they double it).