It's a mental thing with some people. They need OTSRs even if they do nothing.
Personally, I'm happy with the current trend of restraints that are much less head bangy, so less OTSRs. Banshee barely feels like it has them at all with the new style.
What ultimately holds you in on a looping coaster is where the pressure is, and it's usually on your lap. Even with OTSRs. It's time we weened people off of them. A coaster isn't any more or less safe because of the type of restraint it has.
Once you get passed that mental block, you'll appreciate the physical comfort that comes with less restrictive restraints. Nobody is "afraid" of OTSRs, they're afraid of the discomfort that often comes their way after riding.