Oh I absolutely could spend a lot of mental effort trying to explain "marxism bad" (It would actually be Vanguardism bad, marxism ancient) but I just don't care enough. I have no interest in being antagonistic (except maybe for a couple of quips), cause it's not going to change anything.
Production and distribution (henceforth economy) is necessary there isn't a magical grace period where people stop needing food. For any anarchist system to work they need to have an economy. The anarchist systems that exist right now solve this by relying on donations and members having jobs. As more and more anarchist systems start popping up (although this is probably never going to happen) this would transform to a more independent/self-sustaining system. But what that system looks like doesn't really matter, because whatever it is will be determined by the ones who make it.
This is the ultimate difference between anarchism and everything else, and the reason why I think so many people bounce off it. Anarchism requires belief in people. That whatever system they come up with will work and compliment others who will be able to build their own systems: Economic, social or political.
Anarchy is a process of creating social structures that defy oppression, control and manipulation, and believing that these structures will be able to solve the problems they face. It's not just about economy but about the connections people form. When I look at communists I see only economic analysis: Class, Production, Ownership. Concepts which are secondary to the thing that actually matters: eliminating oppression and exploitation, not just economic, but also social and political.