Earlier quoted context omitted.
There will be a lot of obvious stuff invented in the future that we aren't thinking about now.
My dad grew up on a farm, and latter regretted not inventing the large round baler that most farmers use - he already knew about small round bales, so the only thing missing was make them larger and then haul them on a tractor instead of lifting by hand as you did the small bales. Despite saying the above for years it never occurred to him to invent the large square baler which the same concept (haul with a tractor),…
that's why "non-obvious" is so contentious in patent examinations. How do you KNOW it was obvious at the time?