Makes sense. Base ACKS had kinda already made the argument that HP is a pool of "resolve to fight"; perhaps, and not actual health, as stated with the Mortal Wounds table.
So anything that reduces that resolve - starvation/dehydration, "system shock" sorts of things, the wind knocked out of you by a fall, etc. LOTRO expressed its HP pool as "Morale Points", and drained them both by hits and effects - canonical example being in the presence of a Nazgul - and restored them via rest or inspiration, the game has a "Minstrel" class as its healer.
Instead of assuming you're encouraging bards, assume you're encouraging the best thing (I know that sets the bar low for most but hear me out) to come out of 4th edition: The Warlord!