The real question is who do you think is more qualified to figure out the opinion of 50-100 million people? Polling companies with a proven track record over thousands of elections - some spanning more than 5 decades, or you when you look outside?
Speaking of things people see, I do hope that the lines at precincts will impart the same herd mentality (not to be confused with herd immunity) and sense of urgency like lines at Apple stores or TP shortage in March did and will encourage more people to vote. At the end of the day, at the end of November 3 in particular, that's really the only thing that matters regardless of crowds, yard signs, polls, and forum debates. As little as a 10% change in turnout of a specific demographic can in theory flip the whole election.