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.
Not talking 'martial arts' I'm talking Aikido as shown. What is 'martial' in your opinion?
If you knew how to do it you wouldn't call it sloppy or unrealistic.
If you can't waltz by the way maybe you need more iriminage...