I think so too, although it's hard to believe for me at the moment. Probably my T is as loud as ever but it feels terrible at the moment. My T become much worse 2 years ago (if I'm honest I can't imagine someones T is much louder than mine) and it was really hard to live a normal life again but I managed it somehow even though T was back in my mind every day. Since that I had bad days and better days and thats why I would say it is possible to habituate but it is much more difficult and you need a very strong mind.
If T isn't noticeable during the day (when you are outside, watching TV, listening radio, talk to someone..) it's easy to habituate. I'm not saying mild T can't be a problem for someone but it's not comparable when you have serve T (when you can hear your T over almost everything). This is really a complete other level.
Sorry for being a bit negatively today.