Hearing loss needn't have a severe impact on your mixes. What you're losing starts at the extreme high end of the spectrum and moves downward over time. IOW, the least-important frequencies are the first to go. The most-important are last to go.
Another mitigating factor: average hearing acuity is diminishing across all populations. Constant earbud usage has resulted in 1/3 of all teenagers having the hearing acuity of a 55-year-old. Now, if a 17-year-old has the hearing of a 55-year-old, what will he be hearing when he's actually 55? Experts worry that in another 30 years hearing impairment will have become a major health crisis.
So yes, you may actually have better hearing in your 50's than many teens. (Although this may not apply to those of us who've been playing in bands for half a century.)