NASA still sets requirements and invites several companies to compete for contracts with different solutions. See the lunar lander contracts from a few years ag

NASA still sets requirements and invites several companies to compete for contracts with different solutions. See the lunar lander contracts from a few years ago for example. You are ascribing beliefs to be based on others in this thread I think. What I think is that if a company is going to build and provide the solution then they should own the design. NASA should of course get to be involved in reviews and discussions, which they absolutely fucking are, but I do not think that it makes sense for one organization to design something and the other one to build it as if there's like a hard line between these two activities. I'm not convinced that is how it worked in the days of Apollo either as you've just asserted that without citation.