Making things with your hands is obviously a very tactile exercise. Very fine work like sewing or soldering is obviously something that would require you to be able to see, but boiling water? Filling a charcoal kiln? Hammering flat the end of a pipe and then bending it around your hammer?
There are some other recipes that I’m not sure about because I’m not sure what process the recipe is supposed to represent, like makeshift bandages or makeshift disinfectant. Is the character just making the decision to use rags or ethanol for medical purposes? If so, why does making makeshift disinfectant take 30 seconds, and why can’t it be done in the dark?