IR vs MIS degree for a long-term cybersecurity career?

A 21-year-old student currently studying International Relations with prior IT experience is building a cybersecurity career through certifications (CC/CCNA/Security+, AWS) and hands-on projects. They are interested in cyber warfare, threat intelligence, geopolitics, and cyber policy, but are concerned whether their IR degree could become a career ceiling compared to MIS, given that job postings frequently list CS/Engineering/MIS or related degree requirements. They are seeking perspectives from hiring managers and professionals in Europe/regulated sectors about whether to keep IR and build technical skills separately or switch to MIS.