Moreover prior to the fall of the Iron Curtain the term Central Europe wasn’t used much. After that though some people like Milan Kundera started popularising it much more out of sense of inferiority.
Estonia belonged to the East, even though not voluntarily.
They actively left the Eastern block when they had the chance (like most of the others, so the block is no block anymore), but the terminology lives on, especially used by people who did not suffer from it.
A couple of years I went to a technical event. The event T-shirts were red. Someone from an "Eastern" country felt very negative about that: "We had communism, I will never wear a red T-shirt."
Those in the "West" who don't have the history of suffering don't have any strong feelings about those old things. Many of those who suffered (either personally or at least in stories from their parents) can be rather sensitive about such "mistakes".