Nearly everyone in the west is online. There isn't a "real life" and a "fake online life."
Creating the tools to build community is important. Having places to share information and resources and experiences outside of spaces controlled by big tech is important and could become even more so if communism really threatens the status quo. That makes tools like lemmy useful.
However, it's also on the community to treat these alternative spaces as valuable, as something that can be that resource for people, and as a community that matters. Dessalines and others might have built the tools but it is on us to put them to use.