The product is underproduced with intent.
If I'm a D list rapper, and I try to sell 3,000 albums... well I might sell 100. Butttt, if i make it limited to 300 then they will be sold the same day AND give me clout AND make my next run more profitable.
Don't blame the artist, blame yourself. Silly fomo head (I consider myself a silly fomo head as well)
I think that's where the room for nuance is. Like...there are definitely artists or teams who deliberately underproduce goods (as opposed to genuinely under-estimating demand or being deliberately cautious to avoid dead stock). I cannot be mad at flippers when the artist is also deciding to actively limit the amount of product in the market. Finding that intent can be difficult but it seems like in some cases it's obvious.
Like on the Microphones issue, I think I get the frustration a bit more - expensive item that likely isn't a "quick click FOMO buy", a mystery number produced it seems, and then one seller immediately puts it up for 3x cost on receipt. And the band almost certainly doesn't want to float thousands in inventory given the price of the product will add up real quicky.
The limited hip-hop runs or artists who have 11 variants? Eh. With ya.