Are anti-theft features actually worth it?

Specialist community threads on r/travel, r/solofemaletravellers and r/HerOneBag generally say yes for crowded tourist cities, but with caveats. Locking zippers, RFID pockets and slash-resistant straps deter casual pickpockets, but they add weight and bulk, and reviewers on r/HerOneBag note that strap cables can poke through and get uncomfortable on bags like the Baggallini Securtex line.