oh?
Let's examine the science draw cards:
AI central, 24 MC to buy and play, requires a one time reduction of energy and 3 science tags.
Inventor's Guild: 12 MC to buy and play, then 3 MC to buy the one card you get to look at.
Restricted Area: Variable cost depending on how many oceans you can put the tile next to, but still, once played, you see one card and need to pay 2 MC for it.
Development center: Costs 14 to buy and play, requires one energy production and expenditure, can be ruined by energy tapping or consortium, gives one card per gen.
How exactly is AI central not the best one? Yes, it's more difficult to play, but once played, its effect is miles ahead of the others.