The story line is that "we'll stick to our own to resolve our pass rush" but it doesn't say we won't draft anyone for that purpose. If the team elects to do just that, we'd be "sticking to our own" to develop a pass rush with rookies that would, indeed, be "our own." Apparently, it'll be what's in house and the draft that we'll rely upon for an improved pass rush. It may surely not be a quick fix but I'm not seeing it as hopeless, either.
Anyhow, that's how I interpret what the stated intentions mean. If that's somehow in error, someone set me straight and I'll stand corrected. To me, it's all about avoiding the possible likelihood of overspending for vet free agents who may or may not pan out as the Dallas staff anticipates. Like it or not, evidently that's the plan of those in charge going forward.