You can learn from lots of things - online sources, TV, movies, life experiences.
There is a unique aspect to reading, however - it's not purely about the content you are consuming, it's the cognitive and emotional benefits from the form of engagement with the text, the imagined world (whether in a novel, or understanding a new landscape within a non-fiction text). This is borne out in research.
In terms of learning (I work in this area), while e-resources have their place (online books, e-journal articles and so on), cognitively, we learn and retain information more effectively from physical texts, especially if we engage with them physically - highlighting key parts, writing notes etc.
However, being a reader doesn't make anyone 'superior'. I would argue it's beneficial for everyone to read, in some form, with some regularity. Some people will be avid readers, others less so, just like it's beneficial for everyone to be physically active in some way, but some people will be very sporty / active, and others only moderately so. None of the choices around how individuals spend their free time equates to being superior (or inferior if you don't).