I think it's more likely that insane societies do - elevate one person's consumer choices to national scale.
That puts Apple and Google into a gatekeeping position and allows them to dictate unfair terms because together they control access to what, 99% or more of the consumer market? These unfair terms trickle down to all of us and we end up paying more and have less choice than we would in a transparent, regulated market.
That's what the DMA is concerned with, not some fantasy about feasibility of creating a competitor to Android or iOS, or ease of switching between them which is completely besides the point.