I don’t think it’s wrong. I think it’s correct with the information they have. How many “Biden” supporters are actually Trump supporters who want to keep their preferred candidate secret?
When I was polled before the ‘16 election, the pollster hung up thinking I was the biggest hillary supporter in the country. Joke was on him.
The hidden Trump support is out there albeit more hidden than ‘16.
Oh, I agree about the “shy” Trump voter. I think that was responsible for the surprise results in 2016. Pundits tried to suggest voters had moved to Trump at the end, but that wasn’t the case.
Polling isn’t capable of picking them up. Trafalgar says there is twice as much this cycle as there was in 2016.