We all think were passionate about something until we realise were not really cut out for it.
For instance, a number of students feel like opting for Science in the eleventh standard is what they need for a bright future. A month later we see them shifting to another field like Commerce/Arts and performing really well.
Similarly, internships are a trailer of what your life would look like for the next 20 years (at least). Even if an internship doesnt help you figure out what you love, it will help you understand what you dont like and prevent you from pursuing an ill-fitting career.