Interesting take Elon has on developing space travel.
NASA’s approach was to front load all engineering. Failures were very costly and set programs back immensely.
Elon has a learn as you go philosophy. Everything is being worked in a massively parallel way. If you look at development of the Starship, it’s strewn with wreckage of test attempts. He even switched material for the rocket from composite plastic to stainless steel mid way through.
The important thing is that it works when it needs to. Time will tell.
He has gotten to this point using a lot less money than the traditional method. And he has the advantage of developed computer technology to work all the systems, and record in detail all the failures, for instant learning.
Musk has the advantage of 60 years of test data to know what NOT to do.