Certainly you make some good points that I agree with, but the idea that these letters do not matter unless the majority of the public at large understands them is where you are wrong. They matter, meaning they should be talked about - not because they are a magic bullet.
A lot of things matter to a degree in an election - a flip of 2-3% can make a tremendous difference. If Hillary can be radicalized, then that could be 2-3% easy. Could cost her some Wall Street money up front also.
I agree that a 2% swing could be the difference. In that you’re right, radicalizing Hillary might work. There’s a flip to that though. The attempt to radicalize Hillary could easily gain her sympathy, especially among women voters. It’s also possible that radicalizing her will result in a no net gain for conservatives or even a net loss.
When Obama was radicalized (never enough but the attempt was made) in 2008 the left and media cried racism. They’ll cry sexism this time around.