Well, we developed an easy way to make insulin, and have been failing at getting it to the rest of the world due to lack of political will or economic pressure.

Well, we developed an easy way to make insulin, and have been failing at getting it to the rest of the world due to lack of political will or economic pressure. I seriously see no reason why wealthy people who develop immortality will want or be able to share it with the poor. That, and the idea of "once we solve the hard problem, the easier problems become easier" is a terrible logical muddle that can be used to justify literally anything.