That's only compared to Cardboard though. Gear VR locks the phone in place, so there's no calibration step. Gear VR also has a focus wheel, which while not perfect, does let you hand it to a friend who can adjust it to their vision. Not as good as just putting glasses inside, but glasses come in lots of sizes, and I'm sceptical of claims to be glasses-friendly, which so far haven't proven to be the case (Vive, Rift, and Gear are far from it).