Honestly, there are ways to advocate for better digital privacy without the need to entirely dismantle modern day life.. Arguments like this are counterproductive and are made in bad faith, suggesting that privacy is an all or nothing approach.
Comparing Flowers' total ban on all technology to "A Modest proposal" is incredibly troublesome. His argument seems to be designed to show that privacy is impossible and that government overreach is inevitable and reasonable. He's not challenging existing power structures in any way, but aims to legitimize it. "Crash out" might not be the best term, but I think it helps to emphasize how unreasonable his position is in this matter.