Why are instrumentation techs called hair dressers?

Instrumentation techs are often humorously referred to as "hair dressers" because of their work with fine, sensitive instruments and the precision required in their tasks, similar to how a hairdresser must delicately handle hair. The nickname also reflects their role in "tweaking" or adjusting equipment, akin to how a stylist makes detailed adjustments to a hairstyle. This playful terminology highlights the skill and attention to detail needed in both professions.