My comment wasn’t so much endorsing it’s continued existence, but more exasperation as the thought of an individual having any impact on pretty much the entire world is quite the stretch.
Leftists discourage individual acts as Adventurism. The core through-line of Leftist thought is Mass Action, with differences on how to structure this.
We can learn as much as we like about the alternatives, but making it happen requires action by many many many many people. We can’t even get “libs” in the US to come together on some of the “simplest” shit let alone getting enough people to change the global economic system that gives such mind boggling power to the ultra wealthy.
Both Anarchists and Marxists have ideas on how to have this happen, but they mostly boil down to advocacy for organizing and building Dual Power. You may wish to read The State and Revolution if you want to delve into a thorough theoretical text by a Marxist, but it may not make as much sense if you do not already have familiarity with Marxism in general.