If there is a walled garden, and you aren't in it, you'll probably push for the walls to come down. No moral basis needed.
Even more so now that Trump is in command.
That's not to say they are being selfish, or to judge in any way the morality of their actions. But because of that incentive, you can't logically infer moral agency in their decision to release open-weights, IP-free CPUs, etc.
In the case of technology like RISC, pretty much all the value add is unprotected, so they can sell those products in the US/EU without issue.