Shabbos is not supposed to be boring and one should have a need to text to give them something to do. If it is, we’re clearly doing something wrong.
Alot of people do feel this way. Activies that are not “Shabbosdick” are strongly discouraged. While it is admirable to learn all day, Not everyone can do this.
There are plenty of people especially in the summer with the long days who just need some activity.
Is it better to play Basketball , hang out with members of the opposite gender or Text on Shabbos. While it might be admirable to say neither and one should learn, Its just not happening for many (Kids are voting with their actions )
I have seen very few real solutions to help teens pass the time on Shabbos that is both fun and meaningful for most.