The Shuttle wasn't designed to go beyond Earth orbit, and was designed for much bigger payloads (including the ability to return those payloads from orbit), so I'm not sure it is comparable.
I don't suspect the parachutes, floats, and similar systems that the Apollo capsule carried for returning directly from lunar orbit weighed more than the amount of fuel that would have been necessary to slow it to orbital speed, but I haven't done the calculations. It also requires the added complication of not only slowing to orbital speed, but docking with whatever system you've left in Earth orbit for the return to Earth.
I know very early on, NASA did look at concepts such as a single spacecraft to launch from Earth, go to lunar orbit, land on the Moon, return to Earth and land. They ultimately settled on the system they did, with a separate craft (the LM) to land on the Moon. I don't know if they looked at other variants, such as three crafts (one for Earth to Earth orbit, one for transit to the Moon, one for Moon landing) or a two-craft variant combining steps 2 and 3 (not steps 1 and 2).
I suspect that the system that you developed would depend on lots of things, including if you were planning to do it once, or six times, or one hundred times.
And I'm not sure anyone had looked at aerobraking as a viable technology by the mid 1960s. According to
wikipedia, it was a science-fiction idea in 1948, but the first test of it wasn't until 1991. And even aerobraking requires some added equipment. Parachutes and heat-shields were tested back to the Mercury program.
I have to admit that I'm unsure how the discussion worked around to this, and what this has to do with either the Moon Hoax or the Russian space program.
