Oron; I agree with you.
For what its worth, I think both sides should be able to trade for each other's techs.
However, the applications could be slightly different; for example, the life force wonder could provide less benefit for good civilizations, reflecting that for the good civilization, going into it is voluntary, not compulsory.
Evil civs should be able to use Benevolence -and I really don't think it should be handicapped for them, either...-. I mean, there are tons and tons of charismatic evil people who pretend to be benevolent. They are not innately so, but they CAN *learn* how to act that way to reach their own diabolical ends.
Really though, you could rationalize for all of the techs;
For the good civilization using the life force wonder, you could say that society has progressed enough that people care about the common good to the point where they are willing to sacrifice their lifes in the generator rather than simply rotting away in the ground.
P.S. Where is your name from?
P.P.S: What exactly do those random event 'artifacts' do? The ones that grant the fortunate AI *but never the player, not even if he conquers the AI, d'oh,* 'ever increasing power'.