Yeah, my bad I glanced at the spell and missed the remove disease part.

On the other hand, what percentage of the priest population is granted spells is still one of those things the DM has to decide. Do the gods
want their clerics running around casting lesser restoration as often as possible or is there a limit to the god's power which includes restricting how many spells can be cast unless you are one of the chosen?
I assume adventuring clerics would be incredibly rare in most campaign worlds and personally don't assume there's a holy person that can cast spells in every village.