Yes exactly!

And also trims, fabric printing,
dyeing!

For a long time I always go against decoration
but I've really come to appreciate
There is so much attention to detail in couture.
The couturier I talked to will sometimes make a garment in only a few hours and then she will tell me, "but for the pocket it takes a whole day!"
^^Well, they do use machines sometimes, but I know that when using a machine the seam is bulkier and stiffer simply because two threads are used...that's why most of it is done by hand...because it reduces bulk and it's a much softer seam.
btw..replying to this
hmm feels like ages since this convo started
What you have written I have read in books myself
but according to a person who has worked in couture most of her life, it's not really any big deal,
Like you said it's only important that bulkiness is reduced. The cause of a bulky seam is not the machine-stitching at all, it's the seam allowance. So naturally you trim |and press| that
There wasn't much difference in a hand-sewn seam to a machine-sewn from my samples. There was never really anything worth noting...
The only thing is hand-sewing is especially useful when finishing edges, the details because you can sew in such a way or in such an angle that the wearer doesn't notice the threads at all. This is one of the main things for hand stitches and it's of course something a machine can't do.. You have to mold the fabric in your hands and sew at the same time..
Rummaging through books, I'm finding couture techniques is not really anything super secret, since I have found similar techniques in books as simple as the Reader's Digest Complete Guide to Sewing, surprisingly. There is just a standard that has to be maintained in couture, so some of the methods in the Reader's Digest book for example are slightly modified. So the secrets really lie in each atelier/design house, they have certain ways of doing their own things.. a way of stiffening something, something they've practiced and refined over time. It would be enjoyable(and also possible) to develop your own methods since couture techniques are so varied and flexible, it goes according to your own tastes/design
Like the lady in Signe Chanel says (the one who says it was her last collection at Chanel), she loves the problem-solving aspect of couture
There are so many ways to solve a problem
Even myself I'm experiencing the same thing..and I've only been a while at the atelier. And I always just do what my instructor says, since she is incredibly opinionated. I keep my own 'standards' to myself, in my own projects