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
Even Programmers, which allows "constructive subjective questions" encourages how (and why) questions (see the FAQ).
"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.)