Is it not widely believed that, because of Galus and the difficulty of kavanah for most Jews, our own silent Amidah is not enough to discharge our obligation to daven and that we need to listen attentively and respond to the Chazzan’s repetition?
It’s not believed by me.
According to your theory, there is no point to daven when there is no minyan present — because you can’t discharge your obligation.
I also firmly believe that a person is capable of having kavanah in davening. That most don’t is an indicator of other problems, but not of a lack of ability.
And lastly, if they aren’t paying attention when they are actively saying the words, why do you think it will be any better when they are passively listening?
The Wolf