Its important to note that:
A. This is utterly unproven, much like non ionizing radiation, there's a movement dedicated to scaremongering about tech, Its fine as is but always keep in mind that more often then not the research is not as thorough as one of such magnitude should be, "Veratasium" did a video about cellphones and brain tumors, a very interesting and topical watch
B. Who are Steve jobs, Page, Zuckerberg, And Gates?
They are mostly smart, hard working individuals who quickly adapted themselves and the tech to the public, using their invention for personal profit, "Conglomerateion", charity work and research.
Their success isn't some magical virtue, they were lucky enough to be at the right position to size opportunities the rose, through their dedication they still are somewhat relevant today.
They are NOT great educators, nor do they claim so I believe, advice on how to use tech they've created should not be taken from them, nor should advice on raising children, based upon those children they probably did not raise.
Nearly anyone knows about Kennedy's sister today because the Kennedy's had a name to protect, much like the British royal family, and the families of those corporations heads, we don't hear about their failures, we certainly shouldn't take tips...