I mean your original point was 'Utd don't have a defender who can pass good enough to be challenging for the PL title' and then you've elevated Luiz and Silva as passing gods/GOATs.
There is a middle ground of Martinez potentially being very good in that role and that don't we need this mythical GOAT level talent to be able to win the PL. Are you saying Stones, Dias, Laporte, Akanji etc are levels above Martinez? Of course not because even Guardiola wouldn't say that. The bigger issue is the overall team and structure, which is another topic. I'm simply saying, purely talking about passing ability, Martinez more than fits the bill of having that quality to play as the central defender in a back 3 and yes good enough to challenge.