Service Technicians vs. Auto Mechanics

Guitar Jones said

It's all about knowledge. You don't just pay for the labor to do a job, you also pay for the knowledge.

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Here a quote I saved :
REMEMBER THAT INFORMATION' IS NOT FREE SOME ONE HAD TO PAY FOR IT. YEARS OF EXPERIENCE,SCHOOL, OR TRIAL AND ERROR SOME ONE PUT IN THE MAN HOURS FOR IT SO DON'T GET MAD IF U DON'T GET WHAT U WANT WITH OUT GETTING YOUR OWN HANDS DIRTY FIRST.