"Normal expressionless faces" to quote OP have been a big part of the foundation of "art" for ages. Hammered in marble, paint brushed on canvas, made with tiny mosaic pieces, and any other possible medium. What makes "hammered in glass" shallow and uninspired compared to any of those?

The exhibitions section [0] has examples of abstract pieces of art too.

[0] https://simonbergerart.com/exhibitions