To understand why this isn't a conspiracy of a sort by some "elite" group of people to take money from 401ks and IRAs, you'd have to argue that there's a good reason to shorten the window that outweighs the reason the window exists. The fact remains that many many IPOs crater within a few months. The rule change seems to exist to leave small low-effort investors holding the bag.
Just because we're paranoid doesn't mean they're not out to get us.