The counter argument to that is that the level of attackers/CFs is not as high as it was some time ago, and their job is made easier by that.
I also think this idea of "modern football" putting a lot more on defenders is overblown. Building from the back is more prevalent than it was in the past, but I'd say the increased pressure is mostly felt by middling/smaller clubs, who would've by default played another way 15/20 years ago. Top clubs have usually, even in the past, got their CBs to be involved in the build up.