Does it meet a human need?
Does it relieve human suffering?
Needs first, food, shelter medicine. All energies of production should be organized for these things first.
Markets fail because they allow individuals with better means to dictate the suffering of others. It becomes a self-reinforcing system where participation in the system is the only way to even reasonably prevent your own suffering.
For instance, we have had the ability to end world hunger now for some time. (for less money than a modern US weapons program). Why hasn't it happened? its hard to justify the continuance of a system that incentivizes the suffering of some for the enrichment of others.
So, people will decide, just like they do now. Only the decision must be compassion based and not profit based.
breadandcircuses