My point is that it does not "resolve" the Tinnitus. It might indeed reduce your perception of it or maybe even cause some beneficial neuroplastic changes, but sound therapy is not the final solution. I am talking about taking away the Tinnitus altogether, and that takes more than just a sound therapy. It takes a multidisciplinary approach and I believe Susan Shore is currently working on a device which facilitates such approach. I do not doubt sound therapy has some effect for some people though, but I don't see it as being able to fully undo the neuroplastic changes which cause Tinnitus.
I don't know what your criteria is for "the final solution", but for me at least, it's something that can take a symptom that severely impacts your quality of life, to a level where you don't notice it, barely notice it or you notice it but you can get your quality of life back (i.e. it doesn't bother you anymore).
If you read the studies I've suggested for your perusal, you'll find that in some patients the Tinnitus disappeared completely, as in "taking away the Tinnitus altogether" as you put it. In other patients, it went from a "difficult to bear" state to a state where it was not an issue anymore (as claimed by the patient).
I don't know about you, but if I can get mine to drop by 75% (in terms of loudness), I'll be very happy (that's the actual number for the study I quoted). If it did go away as it did with some of the patients, then I'd be more than just "happy".
Also realize that for most people, a perfect cure isn't required. The first milestone we'd jump up and down for is something that gives us enough relief to regain critical quality of life.
Very few cures (even for other conditions) are perfect. My stapedotomy closed my air-bone gap, but not completely: I got within 5-10 dB of the bone conduction. Still, it's considered a wild success to go from 50 dB gap to 5 dB, and I'm very happy about that. It's night and day, albeit imperfect.
I'm not sure where your feeling about sound therapy is coming from, but you seem to be open to educating yourself on the issue, so I really urge you to read up on these types of therapies. I have been doing that recently, in particular because I've implemented some of them (from an engineering perspective) so I've had to learn a lot about the specifics of the sound that needs to be created, and it's been quite an eye opener.
What I did find out in my research is that there was a difference between "generic sound therapies" and sound therapies that were specifically targeted (i.e. customized) to a tinnitus pattern. The former yielded benefits in terms of habituation (think "TRT" white noise), but not necessarily in terms of measurable stimulus reduction. The latter, on the other hand, did yield actual reduction in loudness, which of course correlated with improvements on the traditional "questionnaires".
Other things that mattered of course is the type of tinnitus (tonal vs non tonal) and its frequency. Frequencies under 8 kHz are easier to target, especially with music, because that's where we have more energy in the spectrum to play with (especially with compressed formats). If you go higher in the frequency, you need to start moving away from pink noise and use white noise, and then use formats that do not apply a low pass filter during the encoding process (such as an MP3 file format). The width of the notch also appears to have an impact on the result.
I'm hoping that all these studies can help us come up with a flow chart that guides the patient to the most efficient sound therapy for his/her particular type of tinnitus. I particularly like these types of therapies because they are not very intrusive, and very flexible in implementation: any audio player can be used. That means it can be made available to a large fraction of the patients, for a reasonable cost. The downside is that there is no "instant gratification", and it requires strong patient compliance. You'd think that is the easy part, but it's not.