Are ESD wristbands worth it?

My friend and a computer shop owner told me their unnecessary. They told me to just touch the case. Are they necessary though? BTW the only ones I can find locally are cheap $5 ones that have no English (chinese) on the back. However it looks real with fabric, crocodile clamp etc etc... Is touching the case... show more My friend and a computer shop owner told me their unnecessary. They told me to just touch the case.

Are they necessary though? BTW the only ones I can find locally are cheap $5 ones that have no English (chinese) on the back. However it looks real with fabric, crocodile clamp etc etc...

Is touching the case really work as efficiently as a wristband? I know cheap Anti-ESD wristbands yeild almost same results as regular ones, but die out quicker because of their fabric.
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