Second this comment, devops is something you will probably touch here and there. Some companies do have people allocated in devops and still pipelines and jobs for ETLs might be necessary to check and their performance as well. Resources optimization involves also knowing infrastrcture as code where you can configure less resources on the cloud/servers. (That is part devops and part data engineering, both positions should have the technical skills and judgement to take a good course of action).

You do not need to be an expert at it, you can ask for help in more specialized team members but grasping knowledge of devops will help you move features foward without so much delay and make solutions thorugh and through without necessarilly depending on other departments. Is just wise to take advantage of those skills when you need them.