Scott, it's not that people don't care about USPA. It's that they don't care to get involved in the politics or the governance process. That is a distinct difference.
For the most part, skydivers just want to skydive and know that USPA is supporting them in real-world ways. Skydivers DO want USPA to handle licensing, ratings programs, safety & training issues, and the infinite number of things that can screw up an otherwise great day of skydiving. They want us to keep the government out of their way, keep the A-holes from taking them out with bulletproof attitudes, and lead the administration of the world's largest (by far) skydiving organization properly.
As a regional director I get several calls each week from members with questions or issues that require action on the part of USPA. As president, I see DZO's with airport access problems, airspace use complications, airport tenant conflicts, unreasonable or impossible venue requirements, and a million other things that threaten our sport and our rights.
Skydivers also want excellent customer service from USPA and they get it. Call headquarters some time. You will notice that your call is answered by a real live human being, not a voicemail system. That is by design. Ask a member who recently turned in a license or ratings application how long it took to process. Most applications these days are processed within a week, and some within a few days. I've had members routinely report getting applications for licenses, rating, and awards processed within 24 hours of submitting them. Try to get that kind of customer service anywhere else. The list goes on, but you get the point. Most members don't realize what USPA does for our members until they need something. Then they just want their problem solved so they can get back in the air.
The truth is there are many reasons members don't vote that have nothing to do with "not caring" about USPA. A lot of members are newbies who wouldn't know who to vote for without performing a lot of research. Some are lifetime members who have no active interest in current affairs. And many (most?) members who don't vote choose to sit out the elections for one very simple reason - they don't see anything significant that needs changed.
I used to get irritated at people with apathy toward USPA, but after 6 years of service on the board and a front row seat watching USPA serve members with problems that need our attention, I no longer do. The fact is the average member doesn't know the insane amount of work that goes on behind the scenes, but they DO care that we are there doing the work - even if they don't realize it until they have an issue that needs solved.
They also want a nice place to pack and a fridge that keeps their beer cold. We leave those items to the DZO's.