I don't even care if it's that science costs gc...just go back to earning it. If you don't want to base it on gc then come up with some other way to earn it.
15 more science points and I am maxed without doing a thing for it. I asked to be able to turn science off. It's boring to have an advantage that wasn't earned in one way or another. At this point I am considering to release defense and rename my province to "take my science please". (except my monarch would be very unhappy about that of course).
I am a decent player, there are better, but I generally get the job done. In the past I could say I had skill. Now I am just lucky.