There's a version of this argument I agree with and one I don't.

Agree: if you use AI as a replacement for thinking, your output converges to the mean. Everything sounds the same because it's all drawn from the same distribution.

Disagree: if you use AI as a draft generator and then aggressively edit with your own voice and opinions, the output is better than what most people produce manually — because you're spending your cognitive budget on the high-value parts (ideas, structure, voice) instead of the low-value parts (typing, grammar, formatting).

The tool isn't the problem. Using it as a crutch instead of a scaffold is the problem.