When is something valid? Is this fully determined by its context? Or is what is valid for one person possibly even invalid for someone else? Are the assessments of an older more experienced human more valid than those of a young child?
Maybe what we need to learn is that we cannot invalidate what someone else thinks is valid for them. Most of the darker aspects of life are caused by people thinking they get to decide what others should be doing and thinking. Extreme cases of this are the global unelected institutions which consider most of the human population 'useless eaters'. Well, those 'useless eaters' have had enough, and currently the world is burning because more and more people are rising up against those unelected bodies and billionaires wanting to reduce human population.