Recall, if you please, that the rhetorical phrase "However X Y may be,..." translates to "I, myself, don't necessarily believe that X is Y, but perhaps you do.

Recall, if you please, that the rhetorical phrase "However X Y may be,..." translates to "I, myself, don't necessarily believe that X is Y, but perhaps you do. So I'm going to pretend to accept your argument that X is Y in order to lure you underneath a ten-ton weight, which I will drop on you immediately after this comma."