Deep space exploration in ED is not challenging at all. And has never been, at least since I started playing (about three years ago). You have to literally fall asleep or faint or die in front of your PC/console to find yourself in a seriously dangerous situation. And even then, if you have some basic "survival" modules, you can fix your ship to 100% again. Not fixable power plant? Meh, have never seen it below 90%, even though I've made a lot of mishaps and used AFMU and repair limpets countless times.
If DSSA carriers reduce the risk of failure from 0.001% to 0.00000001%, it doesn't really matter danger-wise.
If DSSA carriers reduce the risk of failure from 0.001% to 0.00000001%, it doesn't really matter danger-wise.