Personally, I'm not a fan of anything that's done solely for the trend. I like the distinction you draw between actual minimalism and normal living a lot - you're right, we've become so brainwashed by this excessively consumerist culture we treat normal life like some drastic step back when it's just... normal.
It's probably bad for the economy in the long run, but then, overconsumption is bad for us (and also, I should imagine, the economy on a larger scale in the long run). So I'll take this minimalist core thingy over excessive 'hauls' any day. (I tried doing book hauls when I was more active on Instagram. Except... I would buy like one or two books in an outing. Is two a haul? How many do you need to buy for it to count, and what if I don't wanna read anything else they got? So many questions!)