Correct, we shouldn't use modular small reactors (or molten salt reactors for that matter). We should use the pressurized water reactors we actually know how to

Correct, we shouldn't use modular small reactors (or molten salt reactors for that matter). We should use the pressurized water reactors we actually know how to build. France generates over 70% of its electricity from them, and the US already generates 20% from PWRs. For every existing PWR we need to build 4, and that's enough to fulfill 100% of our electricity demand. Larger reactors are actually more efficient, too. The price per watt is 2-2.5x that of fossil fuels but they remain the only way to produce carbon-free energy around the clock besides geographically dependent solutions like geothermal and hydroelectric power. MSRs may be useful eventually for remote power generation, but as far as bulk power generation the decades of experience building and operating PWRs is too compelling an advantage.