Given the stern warnings against idolatry, isn’t a metaphorical understanding of Communion better?

EPISODE #200: Ted asks about what is true about what the Lord’s Supper is and what it does. Rod talks about when Luther went to Marburg to debate with Zwingly, how he made the case for what the Lord’s Supper actually is, what the first Christians considered it to be, the historical discussion about it, and what spiritual benefits it sounds like sinners receive from it.