I think you can find a few who still do such things in maker spaces, as well, but it only seems to be taken up by people who are already gainfully employed in things that make a lot more than low end manufacturing work.
Rip my favorite shirt? Leave it on the counter with a note and my wife will have it fixed by the end of the day ... Love my wife.
Maybe you mean people who do or used to do it professionally?
How many people do you know that could turn raw fabric into a dress? I have can do the simplest repairs and even used a sewing machine a few times but that’s not particularly useful to a garment factory.
Sewing/dressmaking is a lot like woodworking. Being able to visualize things well in 3D is an asset, but also having good tools helps as well.
It's fairly obvious that people think that these folks can be replaced by software, but they say the same thing about engineers.
Also, entire communities were built around textile mills and transportation/consolidation/intermodals. When we shut down the Garment District, and shipped all the work overseas (and my friend freely admits his company did the same), it destroyed these communities. Lot of skilled labor left, and stopped training the next generation.
And, to answer another question, I don't have to "prove" anything. I was simply telling something that I heard from an extremely relevant source. I'm sure as hell not going to ask my friend to "prove what he said," for the convenience of Internet randos.
Basically, it's the social structure that is built around a community's Raison D'etre, or reason for existence.
This is schools, housing, curriculum (there's a reason that RIT is based in Rochester, for example), as well as oral and learned tradition.
"Tribal knowledge" is a dirty word to efficiency nerds, but that doesn't change the fact that it exists, and is highly effective, for a reason.
There are entire districts, known for the finest $WHATEVER. Lübeck, Germany, is known for marzipan (I don't really like it, but lots of others do). Bordeaux is known for wines and cooking, Afghanistan has some of the best opium, etc. Some of these are due to climate and soil, but others can be lost to other areas (Sonoma, for instance).
They may have great soil, but they also have great farmers, who have been handing their skills down, for generations, etc.
Once that is gone, there ain't no making new ones.
You haven't made a single compelling argument as to why we cannot also rebuild social infrastructure.
Much of this social capital requires lots of folks being interested in something since they were young and "playing" at it. Play is an important way to learn and understand it. Also I believe social capital requires adults to respect and take interest in the item, as children often take their cues from that.
That said, I wonder if industrial clothing manufacturing requires that much social infrastructure? That industry seems to move very couple of decades to a new country with the cheapest labor.
...and I don't have to.
Have a nice Easter/Passover!
For our own sanity we have to believe we have at least some handle on the reality unfolding around us - but even a cursory examination shows this cannot be true. Our lives are so brief, so localised, when set against the totality of all that is, was, and will be. Instead, as we shape the world, the world shapes us, and it is this emergent collective consciousness that conspires to give us all that we have.
How easily do you think a new team of the same size could come in and restart operations? Most likely it would take a long time and a lot of capital before that company was productive again.
That's what the parent means by social infrastructure: institutional knowledge--all the stuff that isn't written down anywhere.
The NASA-industrial complex that built the Saturn V rocket is largely gone: The engineers, factory workers, etc., who had the necessary knowledge — much of it tacit — are retired or dead.