I'm sure you didn't want cancer, but that is the situation you are in.
Every way out of that situation has side effects that you don't want. The worst option for you (though probably not for a 90 year old) is do nothing and side effect death.
You've been on this site a month and done as much research as can be expected from a patient. Your medical professionals have given advice, based on the 'average' man, in reality we are all very close to average so it is probably right for you.
If your wife has already done the same level of research as you, and thinks another option is better, then start talking. If her only research is reading the 'patient consent' forms for surgery, and seeing they are onerous, then she needs to do a lot more research, for example mood swings on HT. she will then either agree surgery is best, or come up with a better option.