Most who do software development/QA in industry learn the SE methods on the job. It is desirable to have a course or two introducing and giving an overview of SE methods (and that can help in projects in later CS courses), but having numerous additional courses on SE methods is of diminishing returns beyond that, while displacing courses on CS topics that someone in software development/QA is likely to encounter in a career (operating systems, networks, databases, security, AI/ML, etc.).
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