Yes, there's no place for democracy on the flight deck, I agree.
But the way I run things in the cockpit, I very much so let the FO make up his own mind on how to circumnavigate the weather, and if he voices his decision and I find it to be safe, he/she may very well proceed with the plan. Making your own choices gives you experience, and there is no better teacher.
I don't feel like I am giving up authority and only on rare occasions have I had to use some stronger words like a simple "No, I don't want that.". This always put the power back into my hands, even with the oldest FO within the company.
nic