No, that’s not a “baptism of desire”. Rather, it’s God extending salvific grace to a person, upon their death, out of His mercy.
You just can’t give up the mistaken idea that there’s a personal pronoun in extra ecclesiam nulla salus, can you? “Outside the church there is no salvation” DOES NOT ADDRESS PEOPLE. It addresses salvation. It does not point to where a person can be found; it points to where salvation can be found. In the Church. Alone.
So, a person – whether a member of the Church, or in imperfect communion with the Church, or outside the communion of the Church – still is saved through the Church, regardless of his status with respect to the Church. That’s all that EENS asserts.
You’re the one making the false assertion that it speaks of a person’s status with respect to the Church. And, in doing so, you’re misinterpreting the doctrine. That’s why our assertions seem nonsensical to you: it’s because you’re misunderstanding what EENS, and therefore, your misunderstanding doesn’t jive with the implications of the doctrine.