I agree with Wilson's conclusions, though the quote is too short to tell if I reached this conclusion in the same way as he did.

Using several maps at once teaches you that your map can be wrong, and how to compare maps and find the best one. The more you use a map, the more you become attached to it, and the less inclined you are to experiment with other maps, or even to question whether your map is correct. This is all fine if your map is perfectly accurate, but in our flawed reality there is no such thing. And while there are no maps which state "This map is incorrect in all circumstances", there are many which state "This map is correct in all circumstances"; you risk the Happy Death Spiral if you use one of the latter. (I should hope most of your maps state "This map is probably correct in these specific areas, and it may make predictions in other areas but those are less likely to be correct".) Having several contradictory maps can be useful; it teaches you that no map is perfect.