Remote attestation is the true enemy of your freedom. The power of the authoritarian corporatocracy to force you to use only the (entire) systems they control. It's worth reading https://www.gnu.org/philosophy/right-to-read.en.html again just to see how prescient Stallman was.
You really wanna be scared? Go look at the multiple comments on the EU DMA announcement complaining that having a sideloading option is just a ploy for malware vendors to get into their iPhones. Or that someone else being able to sideload or jailbreak somehow hurts their security. These are coming from actual HN users!