I don't understand the appeal of "multipolarity"

Personally, I fail to see why many Marxist-Leninists support multipolarity. The primary goal of the Leninist movements has always been "workers of the world unite!" and not "non-US-aligned countries unite!".

To be clear, in saying this, I am not endorsing US-led unipolarity. I am just saying that multipolarity is not inherently good as some MLs suggest. For example, the world in 1914 and 1939 were without a doubt multipolar, and those both resulted in brutal world wars which killed millions.

Could somebody explain why people support multipolarity so much?