Well, I'll admit it ain't the best news ever, Coz. But aside from the expense, technology has allowed these things to advance considerably since they first came about. There are a lot of people wearing hearing aids now, and in some extreme cases, cochlear implants. Guy in the office upstairs from me has one of these amazing devices... 50 years on the job (been in water treatment since he got home from Vietnam in '72) and says it's the best thing ever happened to him. Of course he was almost completely deaf, and your case is much different... you just need a little bit of highs in the side-fill monitor. Might not be all bad if it cancels tinnitus too. Give it a chance?
You'd think as much noisy equipment as I'm around, I'd be losing some high end too, and I may be. I still hear things other people can't. Or maybe I just notice them. I am more atuned to odd sounds as a matter of experience, may be a better way to say that. But electric motors running, dinful pump stations, driving around with the windows down, it's just the aggregate effects of a noisy job. I wear hearing protection when the exposure calls for it, but even I'm not diligent about it. So far, no trouble hearing. My trouble is elsewhere for now.
A couple weeks ago, an exasperated Victoria of Derby said something along the lines of "you weren't even listening to me!". (She does that mumbling, sentence trailing off thing too...) Not really I said, but only because I already knew what you were thinking. It's a good thing my reflexes are still pretty sharp too... it took Her Highness a hot minute to pick up on the complicated nature of the comment. See, I got the message and moved on from discussions to actions. It's efficient. You can't tell academics or engineers anything without writing a dadgum peer-reviewed paper on it... they're right, you're wrong, t'was ever thus.
Let us know how it goes, man. Hate it for you, but only because you do. Glad they can help you.