I really can't remember anything happening after surgery that I hadn't been either warned about beforehand, or which I hadn't read about on half a dozen websites from major treatment centers concerning "what to expect after your prostate cancer surgery." I didn't find this HW site until a month or so after the surgery, but I had already read answers to most of the questions which we normally see here on HW. Certain SE's, such as ED issues, I knew about but for some reason felt personally invulnerable. So, that has been a continuing disappointment.
The info is certainly out there. It's not that difficult to find. Plus, the doctor's office gave me a sheet with a lot of information about what to expect, and when to call if certain conditions presented themselves.
So, for example, when I started having the almost painful feeling that I was urinating while the catheter was still in place, I knew right away it was almost certainly bladder spasms, and within an hour the doctor had called in a prescription that put an end to that in short order.
Certainly the doctor should caution the patient about possible side effects and after effects, but I think it's also reasonable that patients do their own research. I wouldn't buy a car without doing a lot of reading about the model I was considering; and I wouldn't have cancer surgery without researching it first. I even watched a couple of YouTube videos that showed the DaVinci surgical procedure. That convinced me this was pretty major surgery.
Lots of stuff out there, and knowing in advance definitely reduces anxiety.