They proposal also requires dozens of in orbit refils and was rashly awarded in very sketchy circumstances by a NASA executive that now works for spaceX
(NASA was supposed to award 2 contracts for X billion dollars, the new budget has only ~200 million dollars so the executive calls spacex to have them ask a lower price)
Overall my impression is that SpaceX/Musk lives on hype ("Success maybe, Excitement guaranteed" cit Musk) While Blue Origin is trying to build something solid slowly (having infinite money helps...)
I do not mean this as a criticism of Musk (the original video is quite scathing). For a good representation of my personal opinion of Musk I would point to the Slate Star Codex review of his biography https://www.astralcodexten.com/p/book-review-elon-musk