ICT can be used within lessons with any subject, however, ICT should never be used as a substitute for teaching students. Yes, students need to learn how and what ICT is, in order to enter the workforce which relies heavily on having ICT skills for most businesses.
As students learn differently they need to be able to engage in lessons in a variety ways. They can read books, write, draw, use visuals, use concrete material and yes use ICT to help them with their learning. So teachers can use a combination of ICT and non ICT-pedagogy in their lessons.
But for us who are learning to be teachers, we need to be educated in all learning areas including ICT.