Shows how important a well dug in position is, and the sheer tactical disadvantage attackers generally face.

Also explains why even dinky ass castles with a few dozen men as garrison could hold up armies and why armies generally preferred a long siege over an assault, even if they vastly outnumbered the defenders.

Sounds about right when you ever played Total War games as a Siege Defender and are a somewhat competent general…

Hero units in RTS games be like