Wizards is the only game company that is owned by Hasbro, who have shareholders and upper level executives to deal with. They are also the only company making the kind of profits that Hasbro reports in their annual reports. Other companies need that PDF money to survive, Wizards doesn't, and suits can make the case that they'd actually lose money by putting official PDFs out there due to piracy. So it's like comparing apples and sponges - they're being held to different standards.
They got a big black eye with piracy when 4e dropped and it gave the higher ups a really bad impression - they even pulled older material off of DriveThru for a while because of it (even though that piracy was apparently someone at the publisher leaking documents not about sales). Their suits are going to be in a 20th century mindset around piracy for a long time, and I doubt we'll ever get PDFs of current material out of them, even as they were able to convince folks that they were leaving money on the table by not putting the old stuff back on DriveThru.
Complaining about Wizards not putting out PDFs is never going to get them to put out PDFs. What needs to change is that they need to think they'll make more money by putting out PDFs than by not doing it. And just saying "well, I'll never subscribe to Beyond" isn't going to cut it because their suits are going to be thinking about how many copies people don't have to buy if sites like The Trove can just pop up and give it away for free.
