At 2-3 trips per year that means spending 4-6 months at sea per trip. That’s a lot of time away from family.

I would definitely rather work for Amazon and see my family every night.

Would you still rather work on a EcoClipper if they pay you less that $11 a day? That's about the starting wage for entry-level seamen on foreign registered merchant ships. Sailing ships would have to pay even less than that in order to be cost competitive. Outside of maybe a few twee luxury goods, shippers aren't willing to pay more for the privilege of having their goods moved by sail.