So the biscuit knows what you're feeling?

If faith is like the Force (the faith of a mustard seed should allow one to work miracles just as Jesus did) that would indicate no Catholic has ever gotten true sacrament, due to insufficient faith, since we've never had a living person capable of doing miracles. Throwing faith into the mix raises questions regarding everyone's communion and everyone's salvation. Much the way of the witch trials, only those who can do magic can get into Heaven.

If we adopt the modern interpretation of faith (that is, your willingness to give up the data of your senses in order to accept an authority-informed understanding of reality) it implies that people with depression are just doomed to Hellfire. All the latchkey kids who came from an abusive, neglectful household and have deeply ingrained neuro-pathways that fire off multiple times an hour I can never be good enough. will, according to the George Carlin Class Clown interpretation of Catholic dogma are just FUBAR.

Faith, and the inability to accurately measure it or create consistent standards tosses the whole of Christianity (except Universalist denominations) into the the pit of the problem of evil. People exist who are incapable of having faith enough to elevate themselves, which God allegedly created to burn, which makes Him malevolent, at least to those individuals He so created.

When it comes to predatory cannibalism, maybe. We've a genre of horror fiction about people who learned from desperation cannibalism (think: The Donner Party snowed in in the Sierra-Nevadas) who realize they get super-powers from eating human flesh. If those were true, we'd culture the bio chemistries that convey the powers and sell them as supplements.

However, the OG cannibals (cannibal is a Taino word, originally referring to a tribe in the Caribbean) had two practices of sacred cannibalism which resonate very close to Catholic sacrament. One is honoring recently deceased elders in their tribe by eating their brains, which was supposed to pass on their wisdom and help them remember the fallen. The other is specific to fighting and defeating a formidable enemy on the field, in which the victorious warrior would harvest and consume the heart of the fallen foe to gain their strength and courage.

I suspect the notions from sacrament and sacred cannibalism might have common origins, or at least come from similar intuitions regarding how spirit magic works.

As there's over a billion Catholics, it's really hard to get a bead on most Catholics as it's a really diverse group. Even among the clergy, the USCCB is a lot more conservative than even the Vatican and the CDF, and the LCWR is pretty left wing. A friend of mine is a Catholic history teacher, and as he puts it, has a small part of his brain for religious stuff that he gives a pass to, but doesn't question it too much. I've even encountered downright atheist / naturalist cultural Catholics, who practice the rites, go to confession, etc. because it's habit and something they do with family, much less informs their understanding of the natural world.

So yeah, to a lot of Catholics a wafer is just a wafer, except that it's appointed cultural significance within a social framework. While others will believe the wafer is materially Jesus flesh while still tasting like a wafer, and 1 + 1 + 1 = 3 = 1 and they embrace the cognitive dissonance. For some reason, it reminds me of Paradox of Gabriel's Horn, a shape with infinite surface area, but finite mass. So you could fill it with paint but couldn't paint it.