Well, because if the receiver of these can't or won't use Linux, then not efficiently trying to recycle them will either put the burden of getting them properly recycled on vulnerable people, or they just won't be, either sitting collecting dust or being thrown in the dump.
I'm not saying it's a strong reason, but it is a question to consider.
The point of the meme is the experience of witnessing the unique rate of progress in game engines, not the variety. There's definitely more variety now than ever before, if you go looking for it l, and I say that as a 40 year old curmudgeon.