In reality, only a few teams consistently compete for a conference championship at any sport in any conference. First off, I think the Big Sky is one of the better conferences in the FCS so it takes time (and better coaching) to compete at that level. Pick any conference, lets say the ACC in the BCS (which I think may be a close equivalent to the Big Sky in FCS).
In the last 20 seasons, only 5 teams have won the football title in the ACC and 7 teams have won the basketball title. Should teams like North Carolina State, Boston College, Pittsburgh consider moving down to the FCS? That would be ridiculous. I think a viable option would be to switch to an easier FCS conference but we don't have any in our region so we are really committed to the Big Sky based on pure geography.