There’s a powerful argument for smaller populations you didn’t mention at all: it would mean that there are more inelastic resources to go round. More land, so less of a housing crisis, fossil fuels that last longer. Note that while.high population worlds have them own advantage, in being able supply products that depend on economies of scale, those products are things advanced semi conductors, which are something of a luxury compared to land and energy
There’s a powerful argument for smaller populations you didn’t mention at all: it would mean that there are more inelastic resources to go round. More land, so less of a housing crisis, fossil fuels that last longer. Note that while.high population worlds have them own advantage, in being able supply products that depend on economies of scale, those products are things advanced semi conductors, which are something of a luxury compared to land and energy