I wouldn't say so at all. Poor eyesight carries on smartly. Baldness. I enjoy both.
But an old story about the controller code for a surface-to-air missile comes to mind.
Someone looking at the memory allocator spots an obvious resource leak: "This code is going to crash."
The reply was that, while the point was theoretically valid, it was irrelevant, since the system itself would detonate long before resource exhaustion became an issue.
So too prostate cancer back in the day: war, famine and plague were keeping the lifespan well below the threshold of every man's time bomb.
The answer to every "why hasn't evolution done x" question is selection pressure.
An enlarged prostate is something that people get in their 60s and later. Most people are done with reproduction long before that event. There is simply very little and very low selection pressure.
It's pretty much the reason why most humans have peak health into their 40s.
Don't expect evolution to "fix" anything for humans that doesn't commonly impact 20yos.