Aehm yes these are independent qualities. And i didn’t state they are connected. But both (and other business stuff as mentioned that doesn’t come automatically just by being a great dev)are helpful if you wanna bootstrap a small company / freelance business without external funding. You can be lucky and be so well paid for being a so great dev that you never need to save, but it’s good to be able to save when anything doesn’t work out as good as dreamed.

I state you need more that tech skills to be successful. If you don’t have these other skills, better keep in a “safe” employment. But also then i recommend to work on some of these, like at least the negotiation stuff. It will help you.