The difference there isn't about conducting electricity though, it's about the fact that the acid core in plumbing solder is designed to join pipe and sheet metal and will eat electrical wire leading to failure of the connection. Properly heated leaded solder joints will last essentially forever.To use an extreme example, consider WBT vs. acid core plumbing solder.
There's certainly nothing wrong with using WBT and if it's worth it to you, go for it. I can't cast stones, I just spent a couple thousand dollars on mic preamps for recording, and no one in my band but me can hear the difference between them and the preamps in a Focusrite Scarlett.