If every Linux user would boycott AMD to release their source, then we could have libreboot: https://libreboot.org/amd-libre.html ME vs PSP isn't much of a choice. Of course POWER might be an option eventually, but isn't for most of us currently.
Boycott AMD, and obviously Intel [0]. Doesn’t really leave a lot of options. [0] https://libreboot.org/faq.html#intel
It isn't really how it works. For most consumers, we can wait a bit longer to buy anything. They want to sell stuff more often... We become more vocal about what would get our $.