<<<To interpret them faithfully is not "rigidity.">>>

But to interpret them rigidly is not to interpret them faithfully.  There is no warrant in the words or the teaching of Jesus to deny Communion to persons of faith who, having examined themselves, judge that they ought to approach.  That's really the only biblical warrant: that we must examine ourselves (not that someone else should judge us) so as not to eat or drink unworthily.   The hubris is found in those who would judge someone else's worthiness.