If what you fear most is a world full of uncertainty without definitive answers to questions around what you should believe and what you should do, then the JW religion offers the solution by providing clear answers and clear instructions. If what you value most is the freedom from fear about uncertainty, then it’s a small price to pay to hand over to the people providing the answers say over dress and grooming. Handing over power to dictate who you can socialise with, including family members, is a much higher price to pay for the same benefit, yet it’s also a price many JWs are willing to pay.
This idea that JW religion provides freedom from fear in the modern world full of uncertainty was argued by anthropologist Andrew Holden in his book Jehovah’s Witnesses: Portrait of a Contemporary Religious Movement (Routledge: 2002) based on the work of psychologist Erich Fromm, in particlar his book The Fear of Freedom (Routlegde & Keagan Paul: 1942).