I predict that this will blow over, and won't be a big deal in a few years time once FOSS drivers for what is effectively just a new breed of TPM are released.
If in five years, it turns out I was wrong, I'll eat my hat. Although defining "my hat" by then might be difficult, as it'll probably be subscription based.
Part of the reason for this "fearmongering" (if it's fair to call it that) is that Microsoft has released little information about Pluton, besides a press release. Plus, it's not like the fears are completely unfounded based on Microsoft's messaging; Microsoft's press release says Pluton is based off the Xbox[1] (and this paywalled article mentions the same thing[3]), and they've previous said the major goal of the Xbox security system is piracy prevention [2], i.e. DRM. However, I agree with the overall conclusion of the main article that it's probably not much worse that what already exists.
[1] https://blogs.windows.com/windowsexperience/2022/01/04/ces-2...
[2] https://www.platformsecuritysummit.com/2019/speaker/chen/