Agreed. Pushing aside all other reasoning, even the US, being the 2nd largest emitter of greenhouse gases in the world, is only 12% or so of all emissions. It would take a global emergency effort to limit the temperature rise to 1.5C, and there's zero chance of that happening. China, India, and African countries would have to wean themselves from fossil fuels even faster than the US, which is unlikely. The US electorate is probably about to demonstrate its lack of enthusiasm for altering and degrading their lifestyles anytime soon. The same will happen in all democracies, and the autocracies will probably view the chaos as a chance for them to improve their strategic positions in the world. The uproar over high energy prices is already deafening. The industrial capacity isn't there to maintain anything like developed country lifestyles during an emergency transition, so we'd be looking at a worldwide depression and lowered standard of living for years. And no country will make that sacrifice unless everyone does, because the damage to their economies represents a national security threat.
The best way to spend money on climate change is to let technology evolution take its course, and spend money on mitigation factors, like flooding defenses, fire control technologies, hardening power grids, and improving the resiliency of public infrastructure. We're not staring at the precipice, we're falling already.