But anyone can take advantage of tech these days. If someone builds a CRUD website to make hotel reservations, is it a tech company? What if someone installs Shopify to sell goods, is it a tech company?
What is missing however in the picture of "someone building a site" is the other points mentioned in the essay: network effects, building a platform and forming an ecosystem around you. Everyone can do it, but not everyone succeeds. This is why there is such a big rush within tech startups to be the first in a space.