It's even further than this: That 100% of all members or sub-factions of 100% of civilisations choose to do this (or that 100% of civilisations force all their

It's even further than this: That 100% of all members or sub-factions of 100% of civilisations choose to do this (or that 100% of civilisations force all their members to do so even if they don't want it, and that that scenario doesn't escalate into a war that decimates a million worlds and all-but exhausts the resources of a galaxy). If you have the technology for civilisation-scale virtual worlds, you have the technology for von-Neumann probes, and it only takes one to start an expanding sphere of space colonialism.