So, can you please elaborate what exactly I would be stealing? They willingly abandoned any revenue they could get from me by abandoning my platform.
Content creators/providers are legally allowed to restrict the platforms they support. For example, you have to watch some live sports through a cable tv subscription. There is no way to pay for it separately.
Does this suck? Sure, but cable companies pay enough money to make it worth all the lost customers (or at least that is what they are betting on)
You have no legal right to access content under your terms. Content creators have (nearly) complete control (there are some laws around what they can do, but requiring Linux support is not one of them)