This is only true in markets in which increased efficiency = more success. Many markets do not function this way; e.g., the art market. Making more paintings more efficiently does not make you a better-known artist. In many cases, it actually hurts you.
I would bet that more markets become like the art market: dependent on "intangibles", nepotism, personality, and other qualities that have nothing to do with efficiency, and therefore, won't benefit that much from AI tools.