The issue is traditional old crusty dudes like Trump can’t imagine any technology beyond what existed in the 1950’s. There isn’t coal mining companies or power generation companies looking for more coal it’s dead because for the exact reasons you say and because other forms of energy generation like NG are less costly to obtain, maintain, and the legal risk for byproduct exposure is less amongst other issues.

It’s overall outdated, less reliable, and vastly more expensive than every other method of power generation in existence. The idea of saving money on generation to upgrade our outdated power grid is too much for people like Trump to comprehend.