I believe that all text is educational in some way. No matter what it is, whether it's on a shirt, a billboard, music, ect., it teaches you something about the audience it's trying to capture, or even how some people think. As long as you're learning something, I consider it educational. Take a shirt that has a band name on it. Whoever is wearing that shirt obviously wants people to know they like that band, or think it's cool, which means you learned that person likes that band.
For people who think some texts aren't educational, they may be thinking about, say cosmo magazine. Men may think they learn nothing from it, however they can learn a lot about women and how they think, not just about themselves and life, but also how they view men. So it's educational to them. So, all text is educational.
