Sculptors tend to dream big. They have to. They are not obliged, like painters, to confine their works to interior walls. They are expected, instead, to compete with nature, with architecture, with urban landscape.
They can plead off, if they want (I would: Why compete with a tree?). They can make common purpose, instead, with the painters, cozying up in climate-controlled galleries, protected from snow, sleet, salt, and rain.