Though it may for some reason be as designed for pity, it doesn't seem quite like the evil NPC healers are reacting as they should in an RP sense to being "beseeched" by a goodly player. Example when I beseech the evil healer in Galadon:

By the Temple Altar

A pit for sacrifices is in front of the altar.
(Red Aura) (White Aura) The healer is here, administering healing as well as death.

beseech healer
You approach the healer humbly, seeking any aid he can provide.
You sit briefly with the healer, and he offers some comforting words and sage advice.

- I am thinking he should be a little more "evil" instead of sitting me down for tea and a refreshing talk.. He will even heal or do anything as other healers would do. Maybe more like telling me to go **** myself, asking to be paid, or giving me a mal or something for thinking about it.