Lighters introduce unnecessary fuels and chemicals that not only contaminate your cannabis but alter the delicate flavour profile of that dank kush you’re smoking.
The hemp wick is made up of all organic materials, leaving a clean white ash behind, adding nothing but a flame to your smoking experience. The hemp wick also alters the flavour significantly less than a lighter (only topped by say a soldering iron or glass wand).
Lighters also make hits more rough for me, but that’s more of a personal anecdote than anything else. A blunt continually lit with a lighter is much harsher and fuel tasting than a blunt lit with a hemp wick.