Y not “And if this were not enough, whoever it is who controls the mind, is, in the final analysis, anatta, a boat to be discarded on reaching the other shore.”
That which controls (but here in the good sense) the mind , through a good understanding of Tilakhana, is natta, not anatta.
Anatta is the fruit of an out-of-control mind, which by its turn will nourish anatta, namely helplessness and/or ego centered behavior.