monopolies, conglomerates, cartels, monocultures, oligarchies, fragility, lack of diversity, lack of options, lack of checks and balances, inequity...

any way you slice it this cluster of words represents a way of organizing society that is suboptimal and detrimental. anything that can be done by one entity can be done better by multiple competing entities if they are forced to operate in a coopetitive environment.

nobody should have to "prove" anything in the messy specific circumstances of particular industries and companies. society and its economic/political organization should have automatic triggers and disincentives that would prohibit the formation of such structures in the first place.