Why they can't foresee this instead making work for free? I mean, you get a technical team who can interview the possible guy, talking code, you can know what's

Why they can't foresee this instead making work for free? I mean, you get a technical team who can interview the possible guy, talking code, you can know what's the guys skill level, if you cannot see how good he is in interview without making him do puzzles, work for free, then your team's technical skill is really low.