First, simply because Connecticut is closer to those states that do NOT support FBS flagships. The State (and region) has more established private schools with deep alumni and endowments. Yale was Connecticut's premier college athletic program through the 1970s. UConn is NEVER going to be like an ACC or BigTen school - it doesn't have the history or culture, period. Prior to Calhoun's arrival, this was a regional 'mid-major" program. Sure, currently UConn athletics is very successful, but it doesn't have the deep pockets of traditional P5 schools.
Second, the State of Connecticut is dying. With a population of just 3.5 million in the 3rd smallest state in area - we will never compare to some of these other States. Why can Utah (with a similar population) support multiple D-I programs - Utah, Utah State, Weber State, Southern Utah and still compete with BYU in its borders? Connecticut can barely afford UConn and CCSU isn't even an afterthought.
A few others have posted great points on the history/culture/CT politics that apply to our unique situation. Those are the posters that make the most sense and can see both sides of the issue. Anyone who thinks the State should just keep spending on UConn without restraint/controls is absurd.
I'm not so much anti-UConn, but some of these posts do not match the fiscal political reality of our state. Finally, I feel if UConn did more to support and partner with CCSU (both academically and athletically), instead of doing everything behind the scenes at the State level to hold us back from resources, some of us might be more supportive of these types of major State investments.