If you are really into it i suggest research :
https://en.wikipedia.org/wiki/Biological_computing
https://en.wikipedia.org/wiki/Wetware_(brain)
This is the "how". Now the why:
There is a new TV Series recently released called Pluribus. Look into it.
I honestly believe the ultimate goal of the dark elites is to turn the whole humanity into mindless zombies, with no purpose other to serve the "hive".
The elites are not even hiding their intentions anymore