Sorry your here, but as AS is being suggested you are probably not in too bad a place.
No that is definitely not logic, that is emotion. A logical decision can only be made once you have all the information.
You need to know what the MDT team suggest once they have seen all your results. Then you need to consider each treatments chance of success (BTW they are probably all open to you and all equally likely to work).
Then you need consider the possible side effects, and accept you may get none or all and any combination thereof.
Then you need consider your lifestyle and risk tolerance.
That is a very sensible statement the good thing is you can try it for three months and see how bad it is.
Another sensible statement would be.
"Not sure I can cope with incontinence for years". Again you can try this by going down the pharmacy tomorrow and buying a large bag of incontinence pads, and try just pissing yourself for a week using the pads. Might seem a strange thing to do, but better to do it before the op, rather than be blindsided by it afterwards.
I can't immediately think how to simulate ED, maybe just drink five pints of beer each night. Or how to simulate radiation proctitis, maybe try a vindaloo each night.
You really shouldn't just rely on an emotional decision when at present you don't have enough information to make a logical one.