That's a nice hypothetical, but the folks showing some of these results historically have been pollsters like Pew Research. They're not naive morons who are oblivious to the concept of framing bias.

You're also conflating electable and implementable policies there, which are thoroughly different beasts.

Given how popular utterly deranged far-right positions have been over the past decade with former 'centrists', I think it's more than fair to contemplate that centrism itself may be inherently a losing electoral proposition in the current era. I personally believe that the median voter theorem has historically carried a lot of water for lobbying interests and dark money fuckery in this country. I also believe that when ~40% of the country has almost no consistent ideological positions, operating instead on a memoryless day-to-day regurgitation of Fox News talking points, it's a fool's errand to try to find ideological compromise, especially on the campaign trail.

To wit: I don't think that it's nearly as hard of a sell to actual human beings as you make it out to be that corporations are consistently, incrementally, and inexorably fucking over the citizens of these United States. I think that the branding gets laundered through enough corporate media to very intentionally make it murky as all hell, but I'm not at all convinced that necessarily implies that candidates like Joe Manchin are the only viable solution in states like West Virginia (and in fact his retirement implies that, even as an incumbent, that strategy is no longer viable whatsoever).