It can't be because the CCC says it's a unbloody sacrifice.
http://www.vatican.va/archive/ENG0015/__P41.HTM
1367 The sacrifice of Christ and the sacrifice of the Eucharist are one single sacrifice: "The victim is one and the same: the same now offers through the ministry of priests, who then offered himself on the cross; only the manner of offering is different." "In this divine sacrifice which is celebrated in the Mass, the same Christ who offered himself once in a bloody manner on the altar of the cross is contained and is offered in an unbloody manner."188
What’s the phrase...poorly catechised?