So now you want to convince me that in 1969 they could man land on the moon and then come back to earth and in 2019 they still trying to nail down the tech ?
What technologies did they have in the 60s? I computer used to cost thousands of dollars and its the size of your room in the 60s also.
We have both landed and crashed on Mars and the Moon recently. We're not just trying to figure this out, we're trying to figure it out AND do it cheaply.