Why would you "choose" to have surgury - it's not something you do for fun.
When you have a c-section, they cut open your abdominal skin, abdominal muscles and your actual uterus.
They then stitch it back together and you are at a high risk of that scar in your uterus tearing during a subsequent pregnancy.
I have a scar in my uterus (not down to a c-section) why would you want to chose that?
Why would you want to put your self at risk?
It's not a light decision - it'll be with you for life.