The analogy I was trying to make is that if you think there is an obviously undervalued company on the market that is crazily under-priced, you're probably wron

The analogy I was trying to make is that if you think there is an obviously undervalued company on the market that is crazily under-priced, you're probably wrong, and the market is probably right. Similar, if OP thinks that there is an obvious case that Americans would back a completely socialized healthcare system, they are probably wrong, and the politicians that actually spend all their time talking to people and understanding the "market" of votes are probably right. One survey quoting a number of 70% does not mean anything particularly significant.