What practical benefit is there to a tie or hoop earrings or stiletto heels or bell bottoms or t-shirts with goofy slogans on them? Fashion is never rooted in practicality. Fashion is often wildly impractical, pointless, extravagant, and ridiculous. If the technology existed to generate clothing based on powered energy fields, there would inevitably be a point at which it was fashionable to wear such clothing. And then, a year or two later, something else would become fashionable and forcefield clothing would come to be seen as thoroughly gauche.
Only to have forcefield clothing make a come back a generation or two later, when it would be seen as retro or vintage.