I mean, it is. Textiles are a technology. Extracting usable fiber from plants or animals was something we invented, so is making yarn. Knitting was invented, and shaping cloth to a foot was too. And then there's the modern side of automation. There's a lot of sophistication that goes into it.

I don't disagree yet it's also clear "hard science fiction" is meaningless if it's just, the people in this universe wear clothing, make campfires etc.