That’s FUNNY, right there!!
The purpose of the wrist straps we wear is to provide a path from your body to a safe Ground through which the accumulation of Charge on your body can be removed.
The wire implements that purported function.
No wire, no path to ground, no discharge. It’s one of those “laws”…
The inferred purpose of this dingus is to separate people who don’t understand electricity/physics from their money. Does it work? Not on me!
The one redeeming feature it has is inferred from the comment: “great for electrician”. This means the dingus’ wire won’t become the Path for an Arc Flash through an electrician. Saves lives!
You may have touched your LED on the + side, creating a large Reverse Voltage. Some Crees can take that, some cannot. ESD can generate huge voltages, just ask your cat. It takes a few thousand volts for you to feel the spark at all. How much Vr (or Vf for that matter) is your LED rated to handle?
PS: this isn’t necessarily a “bond wire” issue. The GaAs (or whatever it’s made of) can only stand a certain level before the material itself quits.
Generally speaking, when you move your feet (even fidgeting) touch metal. Be conscious of large bodies of metal around you & get skin-friendly with them on a semi-regular basis as you work & all should be well. Not that you need this warning, but be careful around the edges (especially with Apples) as the mfg. process leaves sharp “wire edges” which will filet your hands instantly & leave your work a bloody (literally) mess.
As to the people who abuse computers, there is no real voltage past the PS which will cause you much grief pulling cards & such, even if the card has a “finger” for that supply line. You can extract the piezo “snapper” from an electric-start lighter & use it to shoot sparks on stuff… When I did that, it worked perfectly to kill CMOS devices on a motherboard.
EDIT: PS: If you want to see how bad it really is, try to measure the ESD voltage (when you’re playing Mr/Ms Sparky with the cat) with your DMM… (Don’t waste your best meter on this!) When you’re done, I may be able to repair it for you.