I'm not saying you can't run a large business in the cloud, what I'm skeptical of is whether you can run a large business in the cloud without devops staff, having only developers while the cloud 100% takes care of devops for you.
That's not how I interpreted the comment you responded to. I thought it meant that you didn't mean IT staff, which is true. When you use cloud services, someone else is yanking dead drives and replacing them, someone else has a 24/7 on-call rotation for dealing with power outages and fiber cuts, someone else is responsible for hardware at all levels and lower-level software stuff. That's how I understood that comment.
Now you're talking about DevOps, which is short for Development Operations, which is a developer role, not an IT role. DevOps people automate your buildchain and that kind of stuff. No one is saying that using cloud services means you don't need DevOps, though there are some cloud services that will handle at least part of what is traditionally in the realm of DevOps for you.
