I find it hard to believe you are not familiar with the statistics on cancer occurring in K-9s who are intact. It is not anybody else's responsibility to provide the statistics for you. This is something you need to educate yourself on and then make your choice. That dog is your property and yours to do with as you please (to an extent of course) but make an educated decision. IMO, unless you think she is breeding quality it is in her and your benefit to spay her. I would list the benefits but you don't seem to want to hear them. If you feel spaying is a risky procedure we are on very different pages anyway.

Good luck with your girl though, you obviously love her and are trying to make her happy in your own way and that is respectable.