“St. Paul speaks of the body of Christ in 1 Cor 11:23-30 in the same way Christ himself spoke of it: as His literal body, not the Christian assembly.
Paul’s argument about treatment of individual believers in the local Body of Christ is buttressed by presenting what Christ told Paul - that the sacrifice must be received in a worthy state. He uses the description of judging yourself (examining) before receiving Christ’s body by judging your relationships with other believers. This is what “discerning” means in Greek.
Paul uses this description of self-judgement, especially our treatment of other believers, as a sub-point in the broader instructions before and after this sub-point. It is the central idea of this complete unit of thought. This is seen in the Greek sentence structure, the context of the entire unit of thought, the juxtaposition of His physical Body and His spiritual Body of believers, and in the Greek words for judging, discerning, etc. your relationships with those fellow believers.
Paul’s point is that you cannot receive Christ’s Last Supper elements worthily unless you are in a right relationship with Christ’s Body of believers.
As has been shown multiple times, as even 3 days ago, but some RCs have such a cultic devotion that no matter how many times they are corrected, and their arguments for 1Cor. 11 are exposed as erroneous, as well as for praying to created beings in Heaven, the hyperexaltation of Mary, salvation based on becoming good enough, etc , they must defend Rome at any cost to objectivity and credibility, thus becoming argument for why one should not be a RC.
There was a reason the Lord said,
Let them alone: they be blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch. (Matthew 15:14)
But sometimes for the sake of others such must be refuted again and again.
That may be true also, but the verses in focus deal with the words of Christ about His physical body.