Kraig Biocraft Laboratories Inc (KBLB)

[es1]

Well you kinda asked then answered your question.
"Why would a scientist/geneticist have to come up with a protocol if its been done for thousands of years?"

Answer:Quality control for look and feel isnt even close to quality control for strength and elasticity. 

But regardless of what property or species it's still the same thing.

You choose the desired traits and breed accordingly.
Not all traits are visual. Some are sense of feel some are strength thickness and length.

In mundane silk look and feel are the most important but strength is also important.
Not important enough for in depth testing.

A scientist is needed because our silk the strength and look and feel are in a different order of importance.

That strenght(toughness) is measured by scientific equipment and not eyes or fingers.

It's still the same process used for eons by humans to produce everything from dogs and corn to roses and silkworms