The problem with that is, when you build a gas plant, that's infrastructure that you now have an economic incentive to run for decades. So while switching to these plants might make a small improvement now, it will cause greater pain in the future.
It's not a small improvement though, it's the primary source of the USA's emissions gains. And it comes with the side bonus of promoting energy independence while also creating exportable products.
It's undercutting and killing what makes over 50% of our carbon free energy: our 100 GWe nuclear fleet. Gas is not an ok end point. Nuclear is. Killing an ok endpoint to make small gains while approaching a not-ok endpoint is unwise.
I mean, the reason natural gas makes a difference is because the USA isn't actually trying the cheapest and most effective way: just reducing emissions.
