Well that would make each civilization research all techs by thenself, and would make the game faster to play, as I wouldn't have to worried about having to trade techs, and keep checking if a new tech is available to trade with the AI.
The AI as soon as they research a tech they trade with each other, and by the time they decide to trade with you, there is not much to offer to the AI in a trade anymore.
Trade can be a good thing for a player, (researching a tech first, trading to everyone for as much as you can take from then) but is just to much time consuming.
So according to what you say, is that simple? Just check a box for every single tech, and I'm good to go?
I don't need to change anything else?