Console sells don't matter but software sells does. In fact, Phil Spencer said in a theoretical situation if they can sell fewer consoles, but more software will be ideal. If you buy a ps5 and buy 1 game a year or throw it in the closet it does Sony no good.
This makes sense, since MS is obviously selling their consoles at a loss. Again, software sales this gen pretty much match the console sales, so I don’t get your point why it should be different next gen, especially since MS seems to be pushing for Gamepass now.