What's naive about it? If you look at the accelerating rate of change then there is no indication whatsoever that it's going to slow down.
I think you're confusing the technological rate of change with the societal/cultural rate of change.
No, they're both moving at massive speeds and one fuels off the other. It took one hundred years between the abolition of slavery in the US and allowing non whites to vote, and then less than 50 years from that for a non white person to be president. That seems to be accelerating societal change to me.
Yes, this is a great point. The speed of technological change definitely accelerates the speed of societal change, I had not appreciated the interaction of the two very well, until reading your post.
The societal/cultural rate of change will always be shackled by the human lifespan to some degree, but I think your overall argument stands despite that.
I will also hang my hat on this and say that the debate does indeed have value, and doesn't always go round in circles, if we're all open and honest when someone makes a good point!
I was surprised when I looked up the dates of the US civil war, Universal Suffrage in the US, and Obama's inaugaration as well. It seems like way more time has gone between all the events.