Ya. Armchair treehuggers, like their brethren on the right, can be exhausting. Every year, feral cats kill billions, wind turbines 500k, office buildings another 100k...
Focusing on least harm is far more constructive then selective outrage.
(I volunteered at Audubon for a decade, trying to conserve habitat for fish, birds, trees, etc.)
It's an interesting idea for a place like Australia - use solar power to desalinate water, and pump it inland. You could create an oasis in the middle of nowhere, sort of like Las Vegas.
Most of them are of value? I mean, we buy salt, and esp. sea salt, and most of the other minerals are going to either salable, or at least disposable in some way. You'll even be getting very small amounts of stuff like gold too. (really not much at all, but hey, there's 20 million tons of gold in there)