The point the analyst is making is that Casemiro looks up and cannot see what is an easy 15 yard pass forward because Taylor is very poorly positioned directly between Casemiro and the player. If Taylor isn’t there it’s a very forward pass and a counter attack in our favour.
That’s not excusing or absolving what Casemiro did, he has to be judged on what options he actually had and still did terribly.
As noodle points out though, referees are in the way in every game of football, it's what's going to happen at times when you're playing at such a high and intense level.
It's the difference between not being able to counter quickly perhaps but not the difference in the goal. Top level footballers should be able to assess that the pass is not on and have composure to pick out another option.