In the space shuttle disasters the hardware had at least been used more than once. A huge lot of this one is only tried and tested on paper.

And the idea that 'if we throw this much money at it, it really must be fine' I don't buy either. Look at how that worked out for Boeing.

For all my feelings about Musk I would much rather step into a rocket that has exploded in all kinds of imaginable situations before so they know how the materials and design actually behave in real world scenarios. I do really think that is the way to go.