Their monoculture provides a lower ceiling for capability than the world at large. We aren't remotely fucked.
The quality of the deliverables hasn’t been great, they have been poorly managed and have left many countries either in significant debt or with onerous obligations.
So even if the Chinese state may want the projects to go well, the conduit by which the projects are funded and managed doesn't have much more than shame and prison as sticks, and that's only for people who are caught.