Well, following in Dell's footsteps is maybe not so great
The reason why HP's PC's are so bad are because they are designed to be the lowest cost from design/conception right to market.
During Carly Fiorina's tenure, they outsourced everything including the design to outside companies (ODM) to save money on product engineers and boost profitability. Basically cheapest cost product designed by the cheapest cost people.
Don't forget that HP is completely separate from HPE (HP Enterprise), so the PC business doesn't even have backing from a enterprise division with servers, so basically considered a completely throwaway business.
With Intel's financial results, you think they can survive a complete sanction of x86 CPUs in China? Of course they can kill Lenovo without killing Intel like that, Dell would be happy, but really chasing the PC business is not really valuable.
I would not expect the US Government to think strategically, but really even if they don't care about Intel, a complete ban on x86 would just accelerate what the Chinese government is already doing, that is moving towards non-US controlled architectures. All those engineers working on x86 related hardware would just move directly to RISC-V/ARM-derivatives