'If you could guarantee a trouble free pregnancy and delivery and be well afterwards, would that change how you feel?'
You can't, though.
I had mental health problems in pregnancy and afterwards.
They got worse with every one.
There's no guarantee they won't so you have to make decisions based on the now, not a hypothetical future.
After our third child, as a couple, we had to do some hard-thinking, because Mirena didn't work for me (Depo and Implant then ruled out because what happened was that my depression became exacerbated, on top of many other side effects), can't use combined due to hypertension, don't agree with methodology of copper coil and condoms fail.
Women especially don't usually go blindly into sterilisation because it is a more major procedure if it's not performed simulatneously with CS, involving GA, and the potential for ectopic pregnant is higher in the event of failure.
Women who request sterilisation deserve to have their views respected, not patronised and told they will regret what they do to their own body.