It's definitely a portion of luck involved. But if you look at his save today and look at the fact that Del Torro seems to be attentive where Ayuso and Roglic regularly seem to be inattentive it's certainly some sort of quality as well.
Del Toro easily could have crashed and hurt himself today. Roglic and even Ayuso have a history of being inattentive or cautiousless positioned in the field.
FYI Del Toro did crashed and hurt himself today.