The guiding ideal of DSL is audibility and the guiding ideal of APD is selling hearing aids. The latter goal should still end up somewhere reasonable since you can’t sell hearing aids over the long term if people cannot hear with them, but it does tend to lean a bit harder into “comfort and acceptance” rather than “rehabilitation”.
But the brain can’t hear what it can’t hear. And the brain adapts. Different people have different tolerances for rehabilitation. If you’re okay living with something that might start out sounding a bit harsh and giving yourself time to adapt, you may end up with higher function.
However, information that we do not have at this point are the time course and limits of that adaptation. So it can be admittedly frustrating not knowing how long you need to put up with something that isn’t perfectly comfortable in order to maximize gains.