A movie star is someone people look at and go, 'I want to be like that person'. There's the responsibility of desire. It's not something I'm interested in trying. I would fail miserably at it, so why even bother?
The idea is to bring art to people who might never really interact with it. It's for all citizens, and it's about making the city more interesting and more visually significant.
If you have to put someone on a pedestal, put teachers. They are society's heroes.