@Gl0w0ut , as others have responded, habituation is not the true endgame, and any claims that is it are detrimental to the cause.
That being said, for some of us, that is the best option we have. I have had this my entire life, and a recent spike in volume drove me to this forum. I have attempted to take my life, think about it almost every single day, and were it not for a promise I made to someone very dear to me, I would not be here as I know the mistake I made the last time I tried to end my life, and I know how to correct it.
I am old enough that I am fairly certain that I will not see a cure in my lifetime. My ringing is constant, 24 hours a day, and I even hear it in my dreams, I am unable to escape from it, ever, not even for a single moment. It is almost always in the forefront of my consciousness, and for the few moments it is not, it is still there and I am always aware of it.
Like probably every member of this forum, I want a cure, desperately. If I thought that stabbing out my eardrums would stop the ringing I would do so, I would gladly never hear another sound if it meant that the infernal ringing would cease.
One main reason that there seems to be little interest in finding a cure is probably that the drug companies cannot see how to make money from it. That is why there is little interest in finding cures to may problems, the lack of profit potential.
So, the ENTs, are telling you to habituate because, at this point, is the the best option, especially of the other things they have tried have not worked.