I think the issue with "harm reduction" rhetoric is that it starts with the conceit that the argument they're having with leftists is "Biden is no different", and thus they want to convince you that he will reduce harm somehow. But actually, no, I don't think there's no difference if he'd win, that's actually not true.
I think things would be worse, way way worse.
From a materialist perspective, a Biden presidency would strangle any revolutionary energy in its womb by using the overwhelming power of the State to co-opt and neuter the leftist struggle, all the while prosecuting the most radical actors to the fullest extent. His administration will reverse any gains socialism has made in the public eye, take us back to a time when the struggle was hidden behind an esoteric veil. Whereas Trump prevents any avenue from being pursued other than open warfare. His presence gets everyone out of the woodworks, it makes things clear to the average disaffected proletarian that there are only two options, socialism or barbarism, and the liberals struggle to make themselves relevant in the paradigm.
Liberals time and time again keep pressuring the left wing of America into voting, they think of you as complete fucking suckers, they have zero incentive to do anything for you if you keep going along with it. They have to suffer consequences, people are unable to learn unless they actually have consequences. And no I don't think that will make them turn around and start offering socialist policy, I think they're stuck repeating this cycle until we sink into the ocean, but each time it happens they lose more and more relevancy and the State loses more and more legitimacy. It's the natural course of things, it is something we have to confront, and I'm tired of pretending it's not going to come to a head.
I agree, I myself am not an American, and that's part of why this discourse is so frustrating because I can see a picture much larger than America, and I hate how much mental energy both online and in the global media is dedicated to whether the blue man or the red man should be in the white building during the period of time that the stupid fucking country collapses. Any material difference should be put towards answering the question of which man allows this to come to a head quicker because the country needs to stop existing as soon as possible for the betterment of the world, and honestly, Biden will just delay that.