I agree in the main with what you are saying here, still, the wording of the verse presents it as a "rule of thumb". No Moses, I'm not going to do that, because it's not what I do.
I suppose you are starting to see my doggedness at sticking to the wording of the Scriptures.
Much love!
No, it's not "a rule of thumb", as you mean it, because men sin all of the time, yet it was only
then that
the men who engaged in the particular act would be "blotted out". Surely their other sins had not escaped God's notice, any single one of which would (on your view) have resulted in their "spiritual death" long before then, and yet their names had, up until that point, still been in God's Book.
It can't be the case that "all names of humanity are in the Book, and God blots men's names out, one by one, as they sin"--and even if it were, it wouldn't matter, since this version of "blotting out" would include
God's people (formerly, the descendants of Abraham Isaac and Jacob, presently, Christians).
God distinguishes between people at the Church of Sardis: among those at the Church, some have
soiled their garments, but there is another group that
has not. The latter would not be blotted out--meaning that
the former, by contrast, would be blotted out. The Lord had washed all their garments, but some had kept them White, while the others had soiled them. He would blot the sinners' names out of His Book, and would not confess their names before the Father and His angels, because they had "denied Him" in their works--"whoever denies Me before men I will deny before My Father", "they claim to know God,
but in their works they deny Him", "If a man
does not provide for his family he is worse than an unbeliever and has
denied the faith".
In both cases (Ex 32; Rv 3), the grounds for being blotted out are the same:
1) they are members of God's people,
2) they sinned against their God.
Having said that, you can't demonstrate that people who are
not part of God's people (who are
special objects of His mercy (Hos 1)) are in God's Book, and are then blotted out for sinning against God. Again, both times it is mentioned, it is only happening among God's people.