Suggestion as to how to get people to become healers.

[Zojha]

I'll again point to Weeping City or Final Steps of Faith. Sure, they have plenty of bad players but people eventually managed.

Considering Weeping City is prerequisite for Dun Scaith and Final Steps of Faith is prerequisite for Expert roulette, that line of reasoning would imply that everyone in Dun Scaith or Expert is a decent-ish player, as they managed to pass the (supposed) skill checks in the instances you named.

Everyone will have made their own experiences there, so... you gotta check the validity of that statement for yourself.