Yes but producing things locally improves resilience and allows for decentralization. Large container shipping is a feature of free market capitalism and highly centralized industries. In a decentralized economy there wouldn’t be anywhere near as much demand for container shipping.

Don’t overthink it. I would try a few different kinds on different pots and then decide from there. Personally I used to be very worried about this, I used to put debris like rocks in the bottom, etc but over time I have found that when growing things in container I generally like the least amount of drainage possible. I do just enough that the plants cant drown. This saves me on watering excessively. Particularly on my roof garden, it was getting so hot, I just struggled to irrigate adequately and would use a lot of water. Now I just up-potted like a half dozen nightshades for my garden (its raised beds now but theyll be in containers until frost is not a threat) in upcycled yoghurt containers. I cut very thin slits into the containers haphazardly with a rusty old pruner. They’ll do fine. I guess it would be different if you live somewhere super rainy, but somehow I doubt in container garden you will be worried about perfect drainage.

Its a step in the right direction. I can’t help but wonder if ports should be moving away from tugboats entirely though. They weren’t strictly necessary for thousands of years of ocean shipping. Why do we need powered ships at all? Is it because we need container shipping? Because that might just be a feature of the highly globalized fossil fuel era.