Your uncertainty doesn’t have bearing here. There is a preponderance of evidence showing that since 2016 (and before), there number of ‘swing’ voters has diminished to basically nothing.
Neither Trump nor Biden are actually running against each other , because no voters are going to be converted from one side to the other.
They are both running against “the couch”, in that whoever can convince enough of their voters that the election is worth showing up for, will win.
Also, if you were a Republican, why wouldn’t you vote for Trump? He delivered, in one way or another, on all the major policy goals of the base. For the Republican agenda, he’s been the most effective president since Reagan.
Bidens camp is in a fever dream with this strategy. And I agree with the article. it is their strategy.