I think there's a point in that.
Look at Arsenal, yes they've done well to bring back Flamini, but often they still do well with Arteta as their deepest midfielder. Real have looked really good with Alonso, Modric and Di Maria as their central 3. Not a player there similar to Sandro or Makelele in style. I don't think many here would have described Gerrard as a defensive midfielder at the start of the season, yet here we are - Liverpool about to win the league with Gerrard as their anchor man. At Juve it's Pirlo next to players like Pogba, Vidal and Marchisio. At Barcelona the more "pure defensive midfielder" that is Mascherano has been moved to a centre back position.
There are many ways to skin a cat. The dedicated defensive midfielder has to some extent fallen out of fashion and most top class anchor men or deep midfielders are also very able on the ball like Alonso, Carrick, Gerrard now, Busquets, Javi Martinez etc. And are thus to me not really well described as the classical "defensive midfielder".
Part of this is also that Makelele was underrated on the ball and that although his defensive abilities were often highlighted it did seem to make it fine to be a central midfielder that was severely limited on the ball "because Makelele" - even though Makelele himself really wasn't that limited (imo).
This doesn't mean that there isn't room for a defensive midfielder like Sandro in modern football. Not at all. But I do think there's a point that a player like that might not (always) be necessary. And that players like that really have to also be good ball players to become truly top class players.
Yet interestingly almost all the "big" teams you have named in that list that don't play a DM have massive defensive frailties, could not see the Scum/Real/Pool doing what Cheat$ki did yesterday i.e. go away to a free scoring, in form side and gain a 0-0 draw (not that I'm advocating the style, just saying it's an option they don't have).
The modern game is won/loss mostly in midfield, a DM (in a coherent system) might not always win you a game, but it significantly reduces the chances of being overrun there (i.e. losing the game).