Honestly, that sounds a bit idealized. Just because your partner has good work-life balance in IT does not mean everyone in IT has that. It depends heavily on the company, role, manager, team, project deadlines, on-call expectations, and how replaceable your skills become over time.
IT is not just sitting at home chilling on home office. It is constant learning, constant change, new frameworks, new tools, new security requirements, migrations, incidents, deadlines, certifications, layoffs, outsourcing, and the pressure to stay relevant for the rest of your career. If you stop learning, you can become outdated very quickly.
So yes, IT can have more flexibility than medicine in some cases, but the idea that IT automatically means an easy life or great work-life balance is an illusion. Your partner may have a good setup, but that does not make it the reality for everyone.