the only CONCRETE PROOF of the accuracy of the polls (and my assertion),,,,is the 'snap shot' on election day. THAT IS FACT (no guesswork, or 'what ifs' there). Everything else is conjecture, speculation, pure guesswork--and is totally meaningless.
That 'snap shot' on election day VALIDATED with facts,,,not speculation (which is what you use),,,,that my assertion is correct.
Like it not, the polls collectively have proven to be astoundingly accurate. As a whole, they are RARELY outside the margin of error--and aggregated, they are the best, most incredibly accurate gauge around.
Historical facts support that assertion. Speculation supports yours. Have a nice day.