One of my in-laws more or less pioneered the entire clothing manufacturing industry in Southeast Asia. Watching him and his wife tear apart garments by looking at the stitches and feeling the fabric is incredibly entertaining. It's on par with the way I tear apart other people's code on GPUs. 10,000+ hours doing anything gives one some serious skill.

I've even used their expertise as evidence that AI and machine learning could do the same if we only knew how to train it. They've written several books on the subject and they are recognized authorities in Asia.