In my experience, dependency is beneficial to the therapist, detrimental to the client. Yet the client pays.

If your therapist provokes dependency then frames it as a problem, as seemingly many do, it's doubly absurd, like prescribing a powerfully addictive drug then disowning the consequences.

If the therapist pulls back and becomes indifferent, as seemingly many do, then it starts to look emotional abuse in my opinion.

Also I dont see how the client or the therapist can calibrate just the right amount of dependency. It's a pandora's box kind of thing, which cannot be predicted or controlled. Russian roulette basically, with the client assuming all the risk.