Most, if not all, Stack Exchange sites are "how to" sites, e.g.
- Super User: how tos for personal computer use
- Server Fault: how tos for setting up servers
- Photography: how tos for photography and of course
- Stack Overflow: how tos for programming
"How to"s don't come naturally to this subject matter. The only time that something like it has been discussed (that I know of), the idea was rejected: Is writing Science Fiction part of this site?
Is this a problem for the long term viability of this site?
Should we consider how this might site become a "how to" site?
Finally, note that by not being a how to, we are more aligned (and therefore, more in "competition" (for want of a better word)) with Wikipedia which is not a how to.
(Background info: see my related answer on meta.)