I do both.
When I can legally (and ethically) collect seeds from native plants, I’m likely to bring some home to put in to the work-in-continuous-progress wildlife garden. (Imagine something like a classic English cottge garden done in Colorado Front Range and Eastern Plains natives, and you’ve got an idea of what I’m going for.) I’ve started some native primroses from seed that I collected last year, and I’m hoping that the birds and squirrels leave some of the fruit on the self-planted Golden Currant; my goal is to start more bushes and replace at least a few of the !*@&^@#?! buckthorn shrubs that are trying to overrun the yard.
I also plant a lot of heirlooms fruit and veggies, and occasionally do some accidental “let’s see if it grows” plantings. The last one of those was the pumpkin patch that scared our dog. I’ve tried to be a little more cautious since then. 