They’re not. They’re doing it because they fear being SOL if America/the West enforces more sanctions on things like ARM chips/designs or Intel, etc.
And yes, IIRC RISC-V is MIT licensed or something close. Basically companies can take it and implement whatever on top and not have to contribute back.
Im old. I play easy. I just have little time with work, family, etc. To spend yet more time gaming. I enjoy the story and get to experience it quicker than I otherwise would.