this is mostly the fault of the developer, it should be clear to the player what each file is for them. i have a installer for windows games to help double check the correct placement like OS and files location. you cant them players for not understanding what .exe or .apk s for them because that is our job to understand.
Part of you will be right, there are many novice developers who forget to put the operating system or platform that is targeted the game (if it's for Windows, for Android, etc.). But it's also the fault of the user, that although the developer shows that platforms are targeted their games in more detailed way possible, he simply doesn't know how to read the recommendations, or doesn't care, or simply downloads it just because. And once downloaded to the wrong device, they no longer work because of their ignorance. It seems that we need more technological education for this matter, more powerful emulators and also more convergent devices.