[deepsun]

Not true. In early rocket days, soviets tried to use "move fast and break things" approach. They even put artillery generals in charge, who very much liked the approach.

The problem became apparent with several failed launches of moon lander, when rockets blew up or failed to deploy payload. So engineers spent month of assembling a lander that just got burnt. And when it reached its destination, it failed to perform, because they didn't test it separately extensively.

Then they realized it is faster to spend a lot of time testing each part on the ground instead of launching it all together when any bug would prevent even testing the rest.