Its absolutely possible, the worst AWS outage was caused by one engineer running the wrong command [0].

"This past Tuesday morning Pacific Time an Amazon Web Services engineer was debugging an issue with the billing system for the company’s popular cloud storage service S3 and accidentally mistyped a command. What followed was a several hours’ long cloud outage that wreaked havoc across the internet and resulted in hundreds of millions of dollars in losses for AWS customers and others who rely on third-party services hosted by AWS."

[0] - https://www.datacenterknowledge.com/archives/2017/03/02/aws-...