I'm a hardware engineer and grasp fully how simple this is. But cost to make in a garage != cost to make at scale. Bringing hardware to market is expensive. You

I'm a hardware engineer and grasp fully how simple this is. But cost to make in a garage != cost to make at scale. Bringing hardware to market is expensive. You are forgetting mold tooling costs, factory fees, prototype costs, profit, etc. The fixed NRE costs can go to zero at mass scale, but if they intend to only sell 1000 or so (probably a good estimate), they need to account for it somehow.