I've read your other thread in this, in which your consultant seemed more positive, and didn't think you were too high risk to continue.
If you want the baby, and the consultant has said it is ok (which they did) then there is no reason you shouldn't have this baby.
I think your anxiety over this is perhaps making the risks seem worse than they are.
Sections, even repeat ones are very very safe. The risks from repeat sections can mean more blood loss, longer hospital stay etc, but those are all risks that the hospital both look out for and can easily manage. I don't think there is much difference in the death rate, which is tiny. Worst case scenario is likely to be needing a hysterectomy, rather than death, which obviously isn't ideal, but in the circumstances might not matter that much (given that this would likely be your last baby).
Incidentally, women having planned c sections have the lowest mortality rate of birth methods. It's a very safe procedure.
Given you've been given the go ahead from your consultant, there is no reason why head and heart can't be in harmony here.