I, too, like your approach because we must trust Jesus’s words even when we don’t understand how it happens.
However, I think it matters because it is a matter of
faith. We believe that it is the Body and Blood of Christ even if we don’t understand how it happens, because Christ told us so, and he would not try to mislead us. However, many people come to God with an approach like yours, and that is their starting point. They don’t know the means or if they can prove it, but they leave it all up to God.
I think with many Protestants, however, the real reason what the Catholic Church teaches matters is because they see the Catholic teaching as idolatry. They see it as worshiping plain bread and wine. Besides Communion, we have Exposition, Eucharist Adoration, and Benediction of the Blessed Sacrament. At these times especially, there is
great reverence given to the Eucharist: procession, prayers, special attire for the priest, songs, and long periods of silence with people on their knees before the elaborate decorated monstrance, which houses and displays the Body of Christ. In many churches, there is 24 hour adoration with people praying before the Eucharist night and day, without Christ ever left alone. There are quite a few rules of canon law regarding how the Eucharist should be kept and adored, emphasizing the fact that it truly is Jesus. This reverence is quite special, beautiful, and important to many Catholics; this love for the Eucharist could not be there without people
knowing in their heart that it truly is Jesus.
To many non-Catholics, this is seen as idolatry, fruitless rituals and “traditions of men” that lead people away from Christian prayer. Some see it as silly superstition and even cult-ish.
I have never seen reverence like I have when I’ve been to large gatherings for Eucharistic Adoration. Just spending an hour with Jesus in Adoration at the chapel in town is certainly important to me, and it’s one of the reasons I love my faith. It’s not just about Communion, it’s about Christ being physically here, present on Earth for us to visit. I don’t know how it happens but I
know He’s there.
So I went kind of off the topic of Communion and I hope I didn’t confuse you with crazy Catholic lingo…