No, you're right... it's not inappropriate. But really, something like "for the modern admin" is more appropriate and should be used. There is no need for the "modern man", so it should be left out.

The phrase of "modern man" was meant to contrast with old-school admins. For me, it brought up images of classic admins in server rooms either your straight-laced IBM types or your Berkeley Unix neckbeards. Take your pick, but they were both predominantly men.