Based on the videos (I watched those with "randori" in the title) the nages consistently creates openings which the ukes consistently no taking advantage. That is not martial, as a matter of fact. As a matter of opinion that teaches sloppy waza and unrealistic movements, but this is a reasonable opinion.

As to not being able to that, I am not able to waltz as well, this down not reflect on my ability to do martial arts in any way.