Read the article and see why, There is no Conspiracy into why, common sense tells you things cant be powered on forever and still function.
NASA experts believe the probes will be able to conserve enough power to keep operating with at least one science instrument each into the 2030s, but they are fully aware that any additional challenges that arise could always lead to the end of the line for the Voyager spacecraft.
“Every minute of every day, the Voyagers explore a region where no spacecraft has gone before,” Spilker said. “That also means every day could be our last. But that day could also bring another interstellar revelation. So, we’re pulling out all the stops, doing what we can to make sure Voyagers 1 and 2 continue their trailblazing for the maximum time possible.”