Ok, so yes butane if inhaled is not good at all, and should never be done. But, when you burn butane it turns to water and CO2. When you use a lighter most all if not all of the butane is combusted, so you inhale CO2 and water. If you do not want to inhale that, use the lighter to just catch your herb on fire and then just keep hitting the herb so it stays lit.
One thing to note about hemp wick is beeswax is also added as HEMP just does not burn well. So you are also adding other contaminants when using a hemp wick.
We suggest giving it a try. If you like it do it, if you do not don’t.
You can read more here