They complain, they lose things (often their own body parts), and needless to say they have certain physical disadvantages (no muscles, no flesh… need I go on?). Having your own skeleton army may be hip if you are a necromancer and it’s hard to imagine a haunted castle without them, but they really are quite a pain to manage and probably more trouble than they are worth.
Necromancy Ain’t Easy
You sleep with the dead, smell like a rotten fish, and spend your days searching cemeteries for obscure spell components. And what do you get for your troubles? A gaggle of brainless boneheads barely capable of lifting their swords much less using them. Good luck acquiring new territory, wiping out rival wizards, or even mounting a proper defense of your evil forest with these substandard servants. Pro tip: befriend a dragon. Much sexier and infinitely more powerful (assuming you aren’t incinerated on first contact).