I don’t know why you’d think “being interested in nerdy stuff like computers” would somehow translate into virtuous behavior. They seem like entirely different things to me, in the sense that I wouldn’t expect a writer, or a baker, or a chef to have typical ethical behaviors as a group. “What happened” was just that some people got rich and powerful and their real personalities showed through. This is not a new thing…
Whatever tenuous link there was between the two, only existed as long as computers were not really seen as a path to wealth and power. Because then a smart person with the capability to enter fields traditionally associated with wealth and power choosing computers reflected putting personal curiosity and interest over pursuing wealth and power as the sole objective.