You’re assuming there are enough >2nd level casters around to cast Lesser Restoration (or whatever the equivalent is in your campaign). As far as I’m concerned, magic should be extraordinarily rare. Does every preacher get cleric powers? Does everyone with draconic ancestry get sorcerer powers? Can anyone with an instrument kill a commoner with an insult?
In my campaigns, very few NPCs are even 1st level in a class. Maybe one in every 20 villages has a 1st level cleric in their church. It takes a 130 IQ to even start learning to be a wizard. Basically everyone can trace some line back to a dragon in their family tree, but maybe 0.001% ever get strong enough powers to even cast a Light cantrip
The levels in D&D represent adventuring levels, so your average person wouldn’t have any adventuring abilities unless they’ve done something to earn experience. And magic will be as rare as the deities in your setting want it to be since they can basically just give magic to anyone. Hell, some powerful beings even grant magic and powers to their subjects against their wills.
In Pathfinder, magic is common enough that either your village or the next will have a healer capable of that powerful of a heal spell. The only catch is that the casting costs about a year’s worth of wages for a peasant
