Again, so do cats, and Killer Whales, and Homo Sapiens Sapiens, and a host of other creatures IRL.
Humanoid zombies have around a 3 INT. Skeletons have a 6 Int which is Ape level.
Zombies are just stuck in a cycle of eating, not much intention there. Skeletons are supposedly smarter. In 5e Skeletons have a Lawful Evil alignment. So, as in prior editions, skeletons tend to follow orders.
Historically, skeletons have often been ran as just standing around, after control has been lost.
Now, in 5e, it might be fair to have a murderous rampage result..this is at DM’s discretion.
Having a skeleton in full robes (to mask it’s scary appearance), deliver food to the sick during a plague...is that evil?
That Angel, that just turned an entire city to salt, (including infants and toddlers), over a differing view point regarding sexual behavior, seems pretty evil to me.
