Okay chill with the smugness. The “middle class” has a number of mutually exclusive definitions so it would be helpful to clarify which you’re using.

VFX artists, actors, graphic designers, writers, musicians, visual artists, etc. generally sell their labor to capitalists in exchange for a wage in order to survive. This is the definition of the working class. The widgets they produce are not lumps of coal or buildings, but the specific widget produced by labor does not affect economic class.