So the surgeon is planning to do a cystocele and rectocele repair and a hysterectomy (removal of your uterus) plus drain the cyst?
Many women have a tilted uterus which typically does not cause any problems. And removing the uterus will cause other problems with the bladder and bowel because the uterus is a placeholder and separator for the bladder and bowel. Once it is removed those organs drop and no longer have the uterus to separate them which can cause pelvic organ prolapse and fistulas. The vagina can also collapse / prolapse without its connection to the uterus. I'm 10 years post-hysterectomy and my vagina has been like a crumpled up shirt sleeve for some time now...very disgusting.
The uterus and its ligaments are also essential to the pelvis' skeletal integrity. Your spine, hips, and rib cage will gradually shift after hysterectomy which is why the figure changes afterwards.
The uterus is key to a satisfying sex life for many women and don't realize it until it's gone. Something else to consider....
If you do indeed have cystocele and rectocele those can be surgically repaired without removing the uterus.
Hysterectomy is grossly overused in a number of countries with the U.S. topping the list. Only 10% are necessary here in the U.S. Healthy ovaries are also unnecessarily removed (castration) in 50-70% of hysterectomies.
Best of luck to you in getting treatment that restores your health versus causing a whole new set of problems!
It's natural to be scared of surgery. If you are not feeling reassured when you talk to the surgeon, if you are in America you can get a second opinion.
It doesn't sound like avoiding surgery is wise. The best treatment I have had has been from surgeons, but I have chosen my surgeons very carefully. That's not to say there can't be complications, but the more unhealthy you are and the more dramatic the condition, the more likely you will have complications. It doesn't sound lie you can wait much longer.