I do that as well, I am almost always in the all topics view. But not everyone uses it that way.
Many just want to focus on one aspect, or some aspects. They may be uninterested in recruiting, or injuries, so they just look at particular forums. But those people are forced to filter through threads that are more appropriate somewhere else.
There are many ways to use the site, and we as users need to be cognizant of that and take that into consideration when posting. One way of doing that is posting in the appropriate forum. When that is done then the site is more efficient for all users. Those who just want to see everything and those who want to be more selective.