Again it is overly complex. Am I dumb, I don't think so. Not necessarily, maybe they have different priorities and more time. Adults have a lot of things to contend with, jobs, relationships, finances and domestic duties. They often just do not want to spent hours doing things that can be done in five minutes.
Priorities are also different.
Being a teenager myself at the time I knew all the bands and who was who on the top 40. At the time I couldn't imagine not knowing these things. But now I too know very little about contemporary music. My priorities and interests have changed not my intelligence or capacity to understand. So why can't we have appliances and devices that are easy to use and only have a range of options that are meaningful.