I don’t get the salt hype either. Some salt tastes better than others, that’s all I can think of. I don’t enjoy the taste of iodine (or at least I think it’s iodine, it’s the same off taste that makes me not like seafood too much) so I prefer rock salt to sea salt, and iodine fortified salt becomes nauseating real fast if I’m eating it by itself. When used on food all salt tastes exactly the same to me, so I use refined pure sodium chloride fortified with iodine, because it’s cheap and because it’s mixes well without having to grind it myself.
I’m not worried about sea salt or seafood in general because of the plastic content. It’s an absolute travesty the way we’ve contaminated the sea with plastic and I wouldn’t be surprised if it turned out to be an ecological disaster, but as for my own personal health I think the amount and concentration of plastics in sea salt and seafood is much too little to be of great concern. I just saw on the news that they found on average 2.7 plastic micro particles (smaller than 1mm in every direction) in oysters, and assuming the concentration is the same in every food (I think fish which is my main source of seafood is less susceptible, but I’m unsure) I’m only getting something like 100 of those particles in a year. Sounds like quite a bit, but then realize that I stopped using plastic kitchen tools when I found that a plastic spatula I’d been using for a few years was missing more than 1cm of material at the front and you’ll see that 100 micro particles a year is a really small amount of my total plastic intake. We’ve all been chewing on plastic toys since we were babies, so while plastic is undeniably not good for us at all, we don’t know much at all about how bad it is for us, and if there’s an amount of plastic where it’s not harmful at all.