Maybe automated processes yes, but not maintenance and quality assurance of certain jobs. Not to mention that quality assurance, customer care can be auto but I think these are the spheres where a human eye and contact is important and needed
I've used upwork as well as fiverr. I liked Upwork more because of all the small and useful additional details like milestones, see reviews of the freelancers, set dates and more, I liked the UI of the website