The whole matter of the conflict between USCCB and the CCC is a matter of what meaning we give to words, and their context.
it is entirely possible that one might have a marriage to which a tribunal would grant a decree of nullity, and to which the State also would grant a decree of nullity.
For example, the issue of consanguinity is a matter in which both a tribunal and a civil court might find a marriage null - did not exist. In a civil court, this would not be a matter of divorce, but rather a matter of an annulment - a different filing, and different proof than what would be required in a divorce.
A civil divorce does not say the marriage was null, or invalid; it says it was valid, but treats marriage as a contract, not a covenant.
The difficulty, in relation the the Sacrament of Marriage, is that when people people hear the word “valid”, or “invalid”, they most often are not sophisticated enough to understand that the Church (and anyone discussing it with them) is not talking about the legal marriage, but rather whether or not there was a sacramental component to that marriage.
I have actually witnessed the emotional “nuclear meltdowns” and they can have horrible results.
I would presume that most, if not almost every last person who works with marriage cases in the Church has figured this out, and counsels people accordingly. However, there are plenty of “armchair Canon lawyers” who have not, and bluster their way through the matter, never having a clue of how much disaster they leave trailing behind them.
It is a sad fact that about 3/4ths of baptized Catholics do not attend Mass on a regular basis, and a very significant number of that group have nothing to do with the Church whatsoever.
Some of them may be trying to come back to the Church, and are in an irregular marriage; others may be coming to Mass regularly, but have gone through a divorce and are struggling with the possibility of applying to the tribunal.
It behooves most of us, who are not trained in this area, to keep our mouths shut as to what too often is a poorly formed comment about the possible validity or invalidity of their marriage. We should refer anyone in such a situation to the experts, and not do damage - unwittingly - to someone who has separated from the Church, or who may well separate because we cannot explain context adequately.
(name removed by moderator) is absolutely correct and on point - he gets it. If you question what I say, go read his posts.