No this is just ridiculous, and we should blame the devs. This isn't a functionality that is demanding a good graphic card, this is a functionality that is picky about your graphic card. I can run, for exemple, L4D2 with max settings at a 2k resolution and still get good framerate, yet blockland shadows are just too much for my computer. Absolute bullstuff.
I'm pretty sure you're just being a dumbass here
I'm only blaming the devs for making a fun game, there may be small faults to it based on people's hardware, but that is asking for a lot for something to be consistent across inconsistent platforms
and I don't run L4D2 at such high settings, yet shadows are fine for me