Then if I am a coach, I am teaching my C to throw THROUGH the runner (drill her between the shoulder blades).
(That is snark, do not teach your girls to do this)
it is almost exactly what I DD is instructed to do. completely within fair territory, make a hard accurate throw to 1B also in fair territory. if runner wants to not risk getting hit, run where they are supposed to. not saying deliberately hit them, but also do not alter what you do to avoid them.