Why not just wear gloves with embedded magnets? I don't understand the benefit of implanting the magnet.

Implanting seems to come with several drawbacks: infection risk, difficulty of removal if undergoing an MRI, and difficulty passing through security checkpoints.

The advantage is... Saving 5 seconds when compared to just wearing a glove with magnets in it? A glove would also likely provide far far better sensing (more and stronger magnets better placed).