"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

I'll kindly disagree, and put out an offer.

If it's shallow and uninspired, why not make a better version? The medium is freer than Free Software. A sharpened hammer, a pane of laminated glass, and some time.

How hard can it be?