Earlier quoted context omitted.
Focus on noise isolation. Using ER-4P ( https://www.etymotic.com/consumer/earphones/er4.html ) with triple-flange tips is about the best you can get. Better even than $1000+ customs (exception made for Noble silicon customs).
Is it healthy to wear these every day? I have some Etymotic earplugs, which I use at nightclubs, gigs and concerts, but from the way they feel I don't think it would be good for my ears to use them daily.
The physical feeling you get is just pressure on your outer ear canal - it might be uncomfortable (though it shouldn't be, try a different size plug) but it won't lead to hearing loss.
The kind of hearing loss that article is talking about is only caused by exposure to loud noise, and you're only going to be better off wearing earplugs for that.