This makes me feel more anxious
It should not as this is rather good news, see my answer below.
...this is what we spend our research money on? Really?
It is very useful information, actually everything that comes to a finding in tinnitus domain is useful. The more we understand it the more we can find a cure.
At this time we see 2 ways of fixing tinnitus in our brains:
1) healing our ears for those suffering from tinnitus because of a trauma
2) healing our emotional processing system (frontal lobe) for those who are suffering from tinnitus because of anxiety / stress / mental distress / sleep deprivation etc.
The study published here plays into point 2. The more we have studies like this, the more we can tell the world about how this thing works. We don't need one study for that but many so different pharmaceutical companies choose their hobby horse. We know a lot of companies who have chosen to work on point 1, but not so many on point 2.
To me point 2 is the one who brings more hope to me, because I'm almost 100% sure the problem with our tinnitus comes from the fact we are all very anxious people and this is what we have to heal first before our ears. I know this because I have friends who have tinnitus and live very well with it because their brain knows how to make them forget about it and not cry about it all day long. We (people suffering from tinnitus) think it's because it's louder for us but I would be that sure... Obsession is a real aspect of anxious people, continuously thinking about what is wrong instead of what is right.