Is it worth it. I am due to have an operation in October.. I

Is it worth it. I am due to have an operation in October.. I am starting to wonder if its worth it. 90% of the comments are about the post operation pain and suffering. I'm written this at 5.30am as I cannot sleep partly due to the stress of the thought of what coming after the operation and partly due a slight pain in my foot. I am very active and cycle over 6000km a year and not one to sit around and read a book. It there anyone who can give me some reassurance that n