Earlier quoted context omitted.
That's a nice history lesson but sideloading alternate appstores (namely F-Droid) on Android works great and Apple shouldn't be allowed to forbid the same on iOS. And I don't give a damn about the "grandma conned into sideloading scam apps" scenario. Grandma is getting scammed over regular phonecalls already anyway.
So what you want is to remove the option of safety from those that want it because you personally do not see the need for it. iOS is not close to a monopoly. People are perfectly free to have Android devices and side load apps on to them. It is curious that the campaigning focuses so strongly on destroying the high trust part that exists and not on promoting a trusted setup on Android.
And people who do not like "unsafe" technology are perfectly free to not use it at all.
If you make something idiot-proof, they will simply provide a better idiot.