Not really. I do buy classic games like VtM Bloodlines which have no chance of being released for Linux because they are already historic, but I'm not buying recent games which developers don't release for Linux while they can. This way I support those developers which release Linux games, there are plenty of them. When the game is historic - it doesn't matter if you buy it or not in this aspect, because the game won't be worked on anymore.
Agree on the "old game" stuff. But not buying a game and using it is piracy by all manner and form, whereas you do pirate it for good reasons (Linux) or bad reasons(saving money). I'm gonna assume you don't play the Witcher 3
MS gets money from you buying Windows. So emulating Windows strips them of their income, which is perfectly fair - you don't use Windows, so you don't pay them.
MS gets money from me using Windows, which contain, a lot of things, including a Graphic API which became so popular it made its only existing historic concurrent (Open GL) irrelevant. AMD, losing the graphic war against Nvidia, especially on the driver scenario, decided to rebalance the cards by creating a lower level API, aka mantle. The decision was obvious : move the expertise from the driver to the developers, stripping their concurrent (Nvidia) of their obvious advantage. The decision was rather good, and arguably, could lead to games better optimized and running better. I've yet to see an obvious and unarguable fact of that.
Anyway, this decision led to Vulkan being created. Suddenly, the dead Open GL initiative was replaced by a more recent initiative, giving new hopes for Linux, who was forced to "emulate" Direct X in order to play games. Will Vulkan work ? will vulkan succeed where Open GL didn't ? My opinion : money still governs this world, and the bad Microsoft still invest more money in their Graphical API than free initiatives do. Hence, when come DirectX 13, 14 and 15, I'd have hard time knowing where Vulkan would be. Arguably, it's a different world, and companies like Google, Apple, Steam and Nintendo probably have incentives to make Vulkan succeed. However, will that serve PC gaming ? Only Steam really is interested in PC gaming so I'd have hard time deciding if Vulkan will eventually beat Direct X in pure graphical power.
In any case, it's irrelevant. Emulating something is always a form of piracy. There are criminality done with good reasons, it doesn't change the criminal form. Eventually, in front of a court, this wouldn't hold. A given WoW legacy server, as well as a Vive VR compatibility tool can both agree to that. Direct X emulation is only possible because there are no real money incentive to kill it.
That's an invalid idea (don't take it personally either). In your understanding, if MS created a lock-in (unethical practice), breaking that lock-in is no different than piracy? Not sure where you took such idea from, but I personally find breaking lock-in (by finding an interoperable solution) not just a legitimate, but even a worthy thing. The whole purpose of lock-in is to enforce monopolistic conditions of market control. Breaking lock-in therefore restores fair competition, so your comparison with piracy is incorrect.
Again, you are, quite validly to be honest, justifying "criminal" (I always considered "criminal" was a rather strong word for software piracy) acts by philosophic/ethic explanations. Monopolistic conditions can be fought, and are fought, via the law. Most countries have anti monopolistic laws, which arguably may not be efficient enough. However, justifying unlawful use of content as "ethical" and denying them as "piracy" is wrong in my opinion. When using a platform, a system, you agree that you pay for the platform, as much as you pay for the content.
When someone buys a PS4 games, he pays both the company producing the game, than he does pay Sony. Same goes for Xbox One, same goes for PC game. Same goes for Steam, etc. A game is compatible with many different platforms : if your platform is not in the list, emulating this platform with any other platform is a form of piracy. In case of PS4, playing a PS4 game on a Linux system, even if you buy the PS4 game in the first, is still piracy in regard of Sony. Same goes for Direct X imo.
This doesn't mean I do not understand your reasons, or even that I do not agree with them. I just call a cat a cat