Why does nobody ever call Apple out on this bogus argument by simply countering that people "side-load" apps on Mac computers every day. Everybody is fine.
"Side-loading" apps has been the norm ever since computers have existed. It was only in 2007 that Apple came up with this ridiculous idea to want to control exactly which apps can and cannot be installed on their operating system.
And that's why we have had malware for decades.
Restricting what a user device has so many benefits that it has become the norm in companies except the very small ones.