One fun thing about babies is that all of their babbling and nonsense is entirely purposeful. They believe wholeheartedly that they have something important to say and are expressing it clearly; that the remote control truly belongs in the trash. They have important work to do.
Sadly, people rarely lose this perception of themselves, although some people do actually develop the faculties to communicate, think, and act effectively.
Many don’t, however. Like babies, these folks stumble on through life convinced they make sense and are doing important work.
Only now they can drive and own guns and stuff. Sometimes they run countries.