the difference in price would be so small you wouldn't even care
the price of your clothing is mostly supply chain "middle-men" taking their share, not the source material nor the people actuality bringing it to shape. especially with synthetic materials
if it weren't true (i.e. if the material actually cost that much), stores wouldn't literally destroy / throw away brand new clothes just to "refresh" every couple of weeks
there's such a thing called "copyright", and using countless pieces of art for free so that a couple of douchebags become gazillionnaires selling copyright infringement on said pieces of art certainly feels like theft