Got to say it but it may go against the grain.
Seems the consensus is that if you don't like a Doctors opinion- then you keep trying doctors till you find one that tells you what you want to hear.
What you have to do is listen to the medical experts- but if you think the experts are wrong- Research things a bit longer. If Ciocc has a problem when riding a bike- then there could be a problem that Cycling aggravates. So the doctor should be listened to but at the same time the preventative measure should be found and further tests should be done.
But if it is just that the doctor has found the enlarged prostate without any cycling problems- then of course a second opinion should be sought.
Prostate problems come with the aging process. Some of those problems can turn serious so warnings cannot be ignored.