This is no longer true, and I argue that it never was. Many of your casual users get caught up in the Internet to such an extent that it disrupts their lives for the first while. Naturally, all things distribute along a spectrum of some sort, and there are many casual home users that simply send e-mail to friends and family, sample the web, and check their stock quotes. The Internet has brought tremendous potential to many people's lives when it comes to satisfying telecommuting or entrepeneurial needs. Regardless, the Internet has made this goal a closer reality.
Some individuals work through and on the Internet for a living.
The list is long, and the profits significant. Internet access costs are generally quite low, and self-employed individuals benefit from this fact. In order for companies to get Internet into the homes, they have kept the costs quite competitive. As Internet services continue to improve, bandwidth increases, and costs remain or become further competitive, working at home will become even more of an option for people. Most of them heavily leverage the Internet as one of their skills.