Meh, I think you’re just being weirdly rigid about the erection of statues (I didn’t intend this pun but I do enjoy it upon re-reading). I’m not asking you to personally enjoy this statue or anything, but I think you’re being willfully obtuse about this. What is a mural or an abstract sculpture meant to signify? What have random geometric shapes accomplished to have had statues of them erected in basically every city?
For some reason, people have largely decided that various art projects are worth putting up in public, and some of that art is going to be more aesthetically pleasing or culturally significant to some people than it is to others.
And for the record, while I’m absolutely willing to support the removal of statues of people like Columbus or Confederate figures, I don’t find it necessary or important to do so. Statues can’t hurt people, and I don’t care if one continues to exist or not. So this statue isn’t something I’m defending from “the left” but rather from my belief that people are often just weird about public art.