[Just mythoughts]

One question: If you think God doesn't desire that mankind participate in the work of salvation, why did He bother to become incarnate?

I do not understand your question. Temple curtain practices ended in Matthew 27:50 Jesus, when He had cried again with a loud voice, yielded up the ghost.

51 And, behold, the veil of the Temple was rent in twain from the top to the bottom; and the earth did quake, and the rocks rent;

There is no more that 'veil' or curtain literally or figurative for the priest to do work behind.

[SoothingDave]

I do not understand your question.

I thought so.