solder a board-mount LED by hand ... physically talented from decades of experience These days most people use ovens and solder paste with laser cut stencils,

solder a board-mount LED by hand ... physically talented from decades of experience These days most people use ovens and solder paste with laser cut stencils, which make this stuff mostly about the tedium of ordering, identifying and placing components on the board with tweezers. The solder self-corrects. There is thus little physical skill required in SMT style soldering, at least at moderate component sizes. Source: I trained my company from scratch to the point where we can turn over new prototype quantity boards in 2-3 days (including design, fab, receipt, assembly). Nobody has decades of experience.