It’s probably better to think of it on the spectrum of “atmosphere-rated” vessels. Ships landing in zero-g don’t need feet, they need clamping surfaces. Atmosphere rated might need both, depending on usage. The is just an almost atmosphere rated craft. If the moon and mars weren’t covered with horrible dust we could have it land on feet. But it is instead some of the worst dust in the solar system so we would have to catch it even there wasn’t a big weight pensly for carrying it around.
It can catch both stages & be used to stack the thing as well, simple and genius!