You are putting words in my mouth. Read the entire 4th Canon, and don't put a half mile of space between its two halves.
You needed the space between it's two halves in order for you to see that it does not state that the desire for baptism suffices for salvation, which is why I broke it up for you. If you did not understand that, read it again as it is written. The word "salvation" does not even appear in the canon.
The point that Canon 4 makes dogmatically and infallibly is that the sacraments are necessary, but that despite that, the desire for Baptism by water is sufficient if death intervenes before the actual sacrament can be administered.
I posted to you the definition from Trent's original
catechism for "or the desire thereof", why do you not believe what it so clearly states? Neither it nor the canon states such a thing as you do here above. You have to make your own exceptions to dogma in order to come up with what you did above.
BODers admittedly add all kinds of things into the canon(s) that are not in there - why?
St. Alphonsus goes on to explain that BOD is sufficient to achieve salvation, but it does not remit the temporal punishment due to previous sins the way Baptism by water does, and does not impress the same character on the soul.
Other saints, including the Angelic Doctor St. Thomas also taught of a BOD - so what.
The Church, through Her popes and Councils have infallibly defined the necessity of the Sacrament in order to be a member of the Church - why depend on the good saint whom we already know is fallible, after knowing that we have been bound by the Church to believe that the Sacrament is wholly necessary for everyone?