Not OP, but curious why stencil is not a viable option for mass production? You don't have to roll compound over the stencil manually. Stencils are still used in applications like solder paste.
Yes stencil or screen printing is much faster for mass production. It is faster and you could directly print on a variety of substrates like FR4, plastic, glass and even paper. I'll wirte about that next
Well I'm not trying to reproduce the same picture 100 times but instead 100 different pictures. So it would be 100 different stencils.