I'm confused about DevOps - I thought it was about dev teams owning the infrastructure, testing and deployment pipelines, so that there is no clear delineation

I'm confused about DevOps - I thought it was about dev teams owning the infrastructure, testing and deployment pipelines, so that there is no clear delineation between they person who writes tests, the person who sets up CI/CD pipelines and the person who codes the app. It has nothing to do with frequency of deployments, and it does not mean that no ops team is necessary for running the show, it's about team autonomy and better understanding of different teams' concerns because everyone is doing a bit of everything.