This is absolutely right, and I would go further to say that this kind of technology cannot be perfected without mass adoption. For instance, there is priceless value to the smart phone industry of having billions of "testers," an expansive variety of users that drives a healthy community of app developers, and a high enough density of adoption to justify wireless infrastructure investment. In the end, the economic value of the combined smart-phone user base is probably many times more than whatever resources the 1%ers could pool together to invent a technology that only they would use.
Now, consider the fact that medical treatment carries significantly more intrinsic risk to the user than smart-phone usage (though user born risk varies. . .), and it is hard to see why 1%ers would try to monopolize this technology. On the contrary, I think any rational person with significant wealth and interest would invest in ways to bring this technology to a large enough population in order to ensure related treatments could be confirmed safe at a statistical level.