Earlier quoted context omitted.
Google probably didn't do any real calculus, and I strongly doubt it was anything like a principled decision. They probably just realized that it simply wasn't an option. Android lacks the vertical integration that iOS has. It would have been extremely difficult, if not impossible, for Google to get Android licensees to accept such a heavily walled garden. Remember that this decision was made over a decade ago, back…
IDK, AT&T used to lock out third party apps on their Android phones. It didn't go over well and was eventually reversed. I think they stayed in that state for a few years, though.
For starters, it's something AT&T did with just the phones they were selling, not something Google did with the Android platform or Android phone makers like LG and Samsung did with their phones.