A lot of stationary objects like the Siege Weapons in the FotM encounter, Orrian Catapults in Orr and even doors (FotM) are virtually unhitable by melee attacks.
You will constantly “miss” the target despite standing right in/next to it. There are occasionally certain angles at which it works…but often no longer than a second or two before we’re back to “miss”, “miss”, “miss”.
Now imagine being a melee + condition damage build. Killing an object might take longer than a Bossfight.