It doesn't address, for example, the fact that the two political factions in America now accept different versions of reality. You cannot square that circle with "better disagreement". You cannot paper over a disagreement on the nature of fundamental facts with simplistic calls for a better discourse.
To offer the most salient example: the question of whether or not the President of the country, with the help of his party and a major media outlet, is conspiring with a foreign dictatorship to undermine the democratic integrity of the country.
One demographic believes the above to be true. The other either does not believe it to be true, or alternatively does not believe it to matter even if true.
This is not some issue that can be simply bridged with "better disagreement". I'm sorry, that's just something you don't get to do.
To offer another example: whether the former President of the united states was indeed an illegitimate candidate due to not being a natural born citizen.
One side believes this to be true, the other does not.
This disconnect on reality exists across the spectrum, and the lines are harshly drawn.
If Americans cannot acknowledge that this schism in their country is arising out of a fundamental and deep disconnect on facts and reality that is widening on a day by day basis, not some mere "communication issue", they will never truly be able to understand and address it.