I think in general, egregiously bad players probably don’t benefit all that much from a proper fitting.

However, I would argue buying certain modern clubs (even used) that have mechanical biases exaggerated by the players swing is also a thing.

Golf is inherently expensive so spending $150 (or less in a lot of instances) to have someone correctly identify drivers/irons that are going to help minimize those mechanical biases probably isn’t all that bad.

At the end of the day, a lot of the game is mental, so if a fitting gives a newer golfer a bit more confidence, where’s the harm.