The reason I find "biohacking" and the like so interesting is not that I have any particular interest in longevity, outside of curiosity 

It's that it's people taking agency over their lives and health, and sharing it along the way, by exploration.

The problems in healthcare I believe all stem from a lack of trust in the system, which leads to feeling you are disempowered and checking out.

Exploring, sharing, and collaborating - in the way this new movement is doing - are ways to build back trust. And when trust re-emerges changes in the system occur, a new system can be built.

As Ursula Le Guin wrote:

"The explorer who will not come back or send back his ships to tell his tale is not an explorer, only an adventurer"

As a long-time quantified selfer and occasional biohacker, I agree with you. I think people are realizing they HAVE to take health into their own hands because, at least in the US, nothing exists to aggregate health data easily. I think it's also a timing thing as tech people are aging, thereby become patients themselves, realizing how fucked up it is and are attacking the problem from a bunch of angles. Also, we are FINALLY getting actionable data after years of data collection, graphs and charts. Exciting times!!