That’s because either you or the person explaining it are not fully
understanding.
It’s nuanced.
Yes, according to Canon Law, once you are baptized Catholic, you are always
Catholic. But this has everything to do with the administering of the
Sacarments and the subjugation of Canon Law.
Like I said before, a Baptised & Confirmed Catholic who leaves the Church
doesn’t have to be reconfirmed when he/she returns to the Faith. This
canon was put into place because some people believed that reverts should
be rebaptized and/or reconfirmed. This happens during the time of
Christian persecutions in the Roman Empire. The Church decided this was
not the case, that they only needed to go to confession.
Baptised Catholics are also still subjugated to Canon Law, even when they
leave the Church. This is why when a child is Baptised Catholic, leaves
the Church, marries outside the Church, and then reverts to the Faith;
his/her marriage is invalid (assuming he/she didn’t marry inside a Catholic
Church or receive a dispensation).
However, with all of this said; a person who doesn’t believe in Catholic
Teaching can effectively, in practice, stop being Catholic. For example:
my dad was Baptised & Confirmed in the Catholic Church, but he’s not
Catholic anymore. He wouldn’t even call himself Catholic. I also know
some agnostics and atheists who were baptized & confirmed Catholic; they
are NOT Catholic today. If you reject Jesus Christ you can’t continue to
be Catholic.
Same thing CAN happen with non-practicing Catholics. There is a difference
between a cafeteria Catholic who struggles with Church teaching and even a
dissent who publicly disagrees with the Church and still attends. I would
consider both of them still Catholic. But a person who doesn’t come to
Church and disagrees with everything the Church teaches (except for the
Divinity of Christ) really doesn’t believe or share the Catholic Faith.
It a very subjective thing.
It’s 100% true to say that objectively, once a Catholic always a Catholic.
But it’s also 100% true to say that subjectively there comes a point where
a Baptised Catholic is no longer Catholic.
The point of my original post was simple: polls that do not distinguish
Church attending Catholics vs non attending ones (Catholics in name only)
are skewing the results. If they want to report on the total number,
that’s fine, but also report the same test showing the difference between
the Church attending Catholics vs non-Church attending Catholics.
Afterall, saying something like 80% of Catholic think priests should marry
or birth control should be allowed doesn’t mean much when 80% of Catholics
don’t attend Mass. However, if the study went on to say “99% of non-mass
attending Catholics and 55% of mass attending Catholics think birth control
should be allowed” is very interesting (NOTE: I made those numbers up)
I pray I’m making sense from a logic point of view
God Bless