Right, but society changes around this stuff pretty substantially. A lot of the discourse gets spent debating whether we like the changes or not, and the solutions to the new problems are usually very pie-in-the-sky or completely unachievable. Like we can't really put the social media genie back in the bottle, its here and society has reshaped around it. But banning phones from schools is pretty tangible and I'd probably argue its for the betterment of students.