Chagas disease (caused by biting insects transmitting bacteria into their victims) causes heart disease, and there may also be many other contributors we yet remain unaware of. Science is very short of compete understanding, and the hubris of scientists - as in this case - often is but later punished when their belief in their infallibility is proved childishly conceited.

You are completely correct that no suite of cures will stop all deaths. I note that the lifestyle changes you refer to are only necessary because those lifestyles needing changing resulted from exactly such hubris.

Exactly such hubris as is leading to releasing GMO mosquitoes into the wild.