With every interview process you say "yes" only once and "no" many times. Where there are a lot of candidates, then many more times, while spending less time on

With every interview process you say "yes" only once and "no" many times. Where there are a lot of candidates, then many more times, while spending less time on each candidate. There is no way to design a process that will not leave the majority of candidates disappointed - as soon as they are up front with the amount of work you'll need to do, it sounds ethical to me