Consider using OpenBSD instead. The barrier to entry is higher, but worth it. Hell I'd be surprised if they could get that to run on linux without exploiting a 0day. Windows tries to be too helpful, and that's where the problems arises.
Your point is valid though; why trust them? If you follow that train of thought all the way down you'll be forced to live naked on a deserted island.
The person you replied to also suggested running Linux instead, in which case you are not affected.
Honestly, I would not be surprised if one of them, at some point, tried something like this with Linux, too.
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[0]: https://fwupd.org
The only thing this does, is enable you to update your UEFI BIOS and other machine-firmware from Linux, without having to have a separate dual-boot OS like Windows (or bootable USB sticks) to do that one task, and it frees you from having to download and obtain proprietary firmware-installers/checks per device you want updated etc.
I consider it apt-get for firmware and use it all the time. Everything in one place, easy to keep up to date etc. It's great!
And very importantly: It does in no way enable the UEFI-abuse with bloatware "drivers" as outlined earlier, which is still a Windows-only phenomena, because Linux does not check for nor use these drivers.
Edit: Oh hey there Jeremy. Long time no see! Where did my good ol' IRC buddy go these days? :D