I would rather compare it to car mechanics. Even though every car has the same parts (engine, wheel). Every brand has their own specific way of putting things t

I would rather compare it to car mechanics. Even though every car has the same parts (engine, wheel). Every brand has their own specific way of putting things together. The general principle is the same, but one mechanic just perfectly knows the ins and outs of a specific brands diagnostics tools or the failure symptoms and solutions. Where for another brand he would have to consult a manual.