You’re quite right, Phil. Believing that “out of sight, out of mind” actually works also defies the way the brain works. The brain still uses “storage,” although the thoughts themselves can become imaginary. Think of the people who emigrate from another country, but always speak lovingly of their place of birth. This consumes them to the point where they eventually move back—only to realize it was a sentimental illusion. Without the “markers” of racism, we’ll be allowing people to “re-interpret” history to the point where we won’t care anymore (sort of like the Bible). Racists will claim slavery never existed, Black Lives Matter will contend that all whites supported slavery. At least with some “benchmarks” like these statues, we’ll know where to look for “real” history as opposed to history contructed to suit one’s cause or beliefs.