I think it primarily has to do with Microsoft requiring motherboard manufacturers to include their key, but other operating systems don't have the pull. So it could potentially be seen as a form of lockdown. Personally I also don't see the issue, especially now since it's been a soft requirement for Windows for so long that most Linux distros just handle key generation and enrollment when installing.

I just think the user should be the one to decide whether they enable it or not. Pre-built PCs and motherboards can enable it by default, but it should be simple to bypass (and it usually is) and no company should be demanding or requiring people enable it.

The same applies for TPM2, which is also useful but shouldn't be a requirement. If nothing else because of the E-waste this can cause by requiring PCs to support it. And most new PCs will end up enabling it in the long run anyway, so there is no need to force the issue.