I don't understand what you're saying or objecting to.
Incase this is what you mean: remembering the multiplication table is the antithesis of multiplying in ones head.
Incase this is what you mean: remembering the multiplication table is the antithesis of multiplying in ones head.
But it's not! Because in order to be able to multiply numbers in your head efficiently you must remember the multiplication table.
Additionally my experience tells me otherwise.