Ok first off I am well aware that relying 100% on the groups healer will get you killed its why I love me some UMD and/or Arcane WF (or other self-healing classes) but at the same time why do so many Clerics either refuse to heal or refuse to join a group asking for a healer.
I know this is gonna get me truck loads off neg-rep (because apparently disagreeing with people is discouraged here) but why did you make a cleric in the first place if you didnt want to heal...it would be like a wizard who ignores the fact that he has spells and only melees things or a Rogue who refuses to do traps...I know this isnt their ONLY job but it's their unique thing that other classes can't do (or cant do as well).
I may be wrong but I'm guessing you went cleric for to be a self-healing char...BUT there's many options for this....A ranger, A Paladin, A Rogue w/ UMD, a WF Wizard, A Bard, etc. not to mention multitude of possible Multiclasses.
No other class gets to refuse to do what they were designed to do (except some Multiclasses where they have to explain WHAT they do...but thats another story) so what makes Clerics so special...I've never heard a pure/mostly pure rogue not join a group because their looking for a trapmonkey (Never Met a rogue past the harbor without trapskills) or a Barbarian refuse to rage.
Note: I know other classes can heal to too...but ya know I've never had a Bard complain about healing