Only Master Farmers can pull crabs out of the ocean.

A Master Builder is required for one Puzzle.

Master Scientists add more Tech Points per Success.

Does a Master Doctor have any advantage, other than the usual even increase, where higher skill = more chance of success (as I seem to obvserve)?

How about Master Parents, assuming (as seems to be indicated) one is NOT required for any Puzzle?

When your not playing your game and if your villagers get sick when your not there. It is best to always have a doctor to heal them. If ther is no doctor and when you get back to them. might get a lot of sick villagers like I did and had to find a villager to heal them until the

That's why at least one Doctor. But my question was, what particular good are MASTER Doctors?

and they may found a school!!

If I well remember, the Master Doctors have nothing particular, except, maybe, that they react faster when a villager is sick
And it's the same for the Master Parents.

And of course there's the Jack of All Trades Award in VV3. But even that doesn't impact game play.

In VV1, Master Doctors do not have a major impact on game play. It's nice to see them advance, but not overly useful. In VV2 & 3, there are distinct advantages. In all three games, a Master Healer will react slightly faster, and more accurately to sick villagers.

And the "distinct advantages" are . . . ?