Indeed, unless they've got pi$$ poor management skills (though some would say that's a pre-requisite!) If they've already shown they are a good techie then why not side shift to the commissioned ranks in that trade if they are binned during flying training.
In the days gone by that's what used to happen was it not? You worked up (on time promotion for some trades) to FS or Wobbly, then took a branch commission if you so wished, until pension time.