oh, that ... i just don't trust the trusted platform, and as long as i can avoid it i won't contribute to propagate corporate moves wanting to decide for me what is or isn't allowed to boot or run on my systems.
Why are you trusting anything? It sounds like you don't know what TPM / Secure boot is or how it works. You are in full control over both. You get to decide what is in the TPM (and there are many ways to clear the TPM, Windows provides 3, your UEFI provides some too). TPM is nothing more than a place to store stuff. In the absence of TPM that stuff is still stored on your computer, just typically not in a secure place, i.e. as a file somewhere on your drive.
Secure boot? That's entirely in your control as well. UEFI gives you control over which keys are allowed to boot, you can delete Microsoft's default key, you can generate new keys for your Windows installation, just as you can for your Linux boot process. The fact you don't is your own fault and akin to leaving your house key under the door mat because that's where the previous owner kept it.
i'm aware this is in all likelihood a lost case in the long run, but here we are!
The lost case is the complete misinformation that is preventing people from using these things they themselves control properly. To play with your words: It is your choice but you're not being responsible with it at the moment.