Exactly! This is an example of the many cognitive biases.
To people live outside of China, that event is all they know about Tiananmen. But to a Chinese person especially a local resident, it's a place of many memories - a big playground for kids, a hub for changing buses, the entrance to Forbidden City/Zhongshan (Sun Yat Sen) Park/National Museum, a pathway to a shopping quarter, and of course a place full of annoying tourists.
No one is trying to hide anything. It's simply a wonderful venue for olympic games. The view would have been amazing! You will never get an opportunity like that again.
https://www.youtube.com/watch?v=lGQke3dJdNU&feature=youtu.be... (again please ignore those awkward tourists)
https://www.youtube.com/watch?v=NNYf_OsxLeM