Maybe you didn't read the whole article to get Stephen's point that the Wolfram Language allows you to experiment with a very, very wide variety of subjects without requiring deep expertise (but of course allowing for that as well).
So your point is quite valid, one person can't hope to know everything. This is why it's great to find a tool that allows you to dive deeper into the things you do care about.
So your point is quite valid, one person can't hope to know everything. This is why it's great to find a tool that allows you to dive deeper into the things you do care about.