Why are so many processes now controlled by computers rather than people?

Well, I'd say the main reason is efficiency-computers can handle repetitive tasks much faster and more accurately than humans. In my work as a UI designer, for example, we use automated tools to test different color schemes across hundreds of screens in minutes, whereas doing that manually would take days. That precision really matters when you're working under tight deadlines. Of course, there are cases where human judgment is still crucial, like when we need to evaluate emotional responses to a design. But for data-heavy processes, automation just makes sense.