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This could be done, if everyone involved were willing to accept massive risk to the lives of the astronauts (including the astronauts, obviously).

By which I mean, after hurriedly building rockets and testing them, finally going ahead with a backup rocket and crew to meet the deadline if the first one blows up on the pad.

With the risk of the backup doing the same...

If they're simply gambling on technology and engineering these days 'being faster', they're doomed to failure and I hope the individuals involved don't wind up killing anyone.