This will result in a few "must have" apps being side-loaded to start, and finish with people having to reinstall their phone operating systems every 6 months; to the detriment of the vast majority of users.

Do you not remember what the computers of regular people were like in the late 90's and early 2000's? I remember pretty much everyone non-technical having at least a mild malware infestation and at least one extra toolbar in their browser.

I'm quite happy that the free market created a solution that is more secure.