Why is graphene not used?
Why isn't graphene used commercially in abundance? - Quora. Easiest answer is that it is not easy to produce graphene in large qualities at a decent quality. The very definition of graphene is a single layer of graphite. Extremely difficult to manufacture in large quantities.
Graphene Oxide is poisonous and causes medical problems like the ones described in VAERS reports.
Graphene platelets have jagged edges that lacerate the walls of blood vessels, causing damage and clotting like that described in VAERS.
And they mocked Trump for his comment about injecting bleach.