I agree, all these moves to open iOS are from some of the biggest pushers of enshittification. The walled garden is great for me, and all sideloading will do is open up new attack vectors for me (and more importantly, the tech ignorant people i care about).
I understand the corporate actors pushing for this out of self interest, but all of the bystanders cheering this on annoy me. You already have android, linux phones, etc. etc. Can't you just leave us alone in our walled garden and stick with android or linux or whatever?