I’m only offering my own limited opinion. I wouldn’t hesitate to believe that, at the very least, a greater percentage of citizens in the USA would be less intimidated about giving their opinion about abortion than here in Canada - where the government really stifles the pro-life voice with aggressive political correctness. I believe the US citizens still have a tighter grip on freedom of speech than my fellow citizens here do.
Regarding accuracy, one case in point might be : In a recent election, way back at the beginning, didn’t all the polls indicate there was no way in hell that a particular candidate could ever become POTUS ? . . .then, as it progressed, the poll results changed.
Certain opinion polls can sometimes detect a prevalent societal mood, but moods do not remain static - they change. Individual human beings often appear unable to ever totally shirk the fickle factor. That frequently translates into “intangible” where particular behavioral predictions and opinion polls are concerned.
FWIW Venerable Bishop Sheen , in his video,encouraged people to ask 4 questions when considering surveys and their ilk:
- How many possible cases are there (How many cases could be tested) ?
- How many cases were tested ?
- Can you believe what they (those who were solicited) told you ?
- If it comes from an independent laboratory, who paid for the experiment ? (IOW who paid for the poll ?)