They do! Some have had it real bad as well. Bad cases that have ended tours and put careers on hold include: Phil Collins, Brian Johnson, Pete Townsend, Eric Clapton, Jeff Beck, Paul Gray, etc. This is off the top of my head, there are
loads more.
Tragically, Craig Gill's career permanently came to an end after he hanged himself.
The list of people who haven't spoken publicly, in detail, is going to be much higher. Other celebs and musicians who have it is such an extensive list that you might as well google it. There are loads.
Paul Gilbert talks quite openly in this video about how badly damaged his ears are. Take a listen from around the 12:20 mark. Keep listening because at 15:20 they keep talking about others having problems:
Paul Gray talks very candidly about how it devastated his life in many articles. I'll post one below that's well worth reading (Google his name and read some of the others as well):
https://www.google.co.uk/amp/s/www..../cardiff-punk-rocker-didnt-leave-14195509.amp
Here's an excerpt of Jeff Beck talking about his tinnitus. At the time he had to cancel some work with Guns N Roses because it was too unbearable:
During an interview with Rolling Stone this is what Jeff said, "yes, it's in my left ear. It's excruciating… I mean, it's the worst thing 'cause it's not…it never…it does go away – it's not true to say that it doesn't but, uhh…it doesn't…the doctors say it won't… it isn't actually going away – you've just gotta suppress…they try to come to terms with what it actually…why some people fear it – that's the psychology behind it. They know it's there but why is it such a horrible sound? Well, you can say why a guy is scratching at a window with his nails such a horrible sound – I couldn't put up with that! This is worse!"
In 1993, Jeff had to cancel a guest appearance with the Guns 'N' Roses because his tinnitus had gotten so bad.
This site lists some celebs who have spoken about it:
https://www.stoptheringing.org/fame-wont-stop-the-ringing-20-celebrities-with-tinnitus/
I'm a musician and I know loads of people with this condition in the music world. I personally spoke with both CJ and Ginger from The Wildhearts recently and they both admitted to me that they had been suffering from tinnitus for decades. As far as I know, this has never been mentioned in any interviews and is not widely known. However, behind the scenes it's had an impact on their lives, make no mistake.