In martial arts it is almost the moment you stop loosing you stop progressing.
I think the higher up in akido you go the less anyone is willing to make you loose.
They dont understand that it is a gift to be toweled up by someone better.
Completely agree with most of what you've said. But... I think you're making generalizations, eh?
Some schools regularly quality check themselves, trying to determine if (granted it's a controlled environment so the adrenaline isn't flowing in the "attacker" but we aren't just playing, either) there are places where a a bad guy coming at you full tilt boogie can exploit (or course there, there always are) and we train to work through the breakdown of those things.
Primarily, for the aikido folks, it seems that the hardest thing for them/us to deal with is the basic bum rush... just the rush to close and overpower and bear to the ground and do what is termed ground and pound. If the aikido guy is standing and can move, he/she is good to go. Close that off, stop the movement, or take to the ground and you lose aikido.
But the thing is, take the guy to the ground (or try to) you open up judo. Or BJJ if that's your bag. Every art needs cross training, IMO. There is no magic sword.