I agree with your emotions. 538 puts Biden up only about 6 points in Pennsylvania (their tipping point state). If the race tightens by a few points and the polls are off by a few points, then a very tight race in Pennsylvania is plausible and due to his Electoral College advantage Trump would have a plausible path to victory that doesn't require anything shocking. It just requires several unsurprising things aligning in his favor. The odds are against that, but it's a real possibility that doesn't involve saying that "polls are meaningless!! Fake news!".