"Fabricated hypotheticals"??? How did you like living through the 1990s and early 2000's when Windows was an unfettered vector for viruses. Your position is elitist at best. Only the anointed few who know how to make keep their systems safe from exploits shall have access to computing. Ask your friends in who are not in the software business how they like checking the cryptographic signatures of the binaries that are about to install from the command line. What they don't know how? Well no compute for them.
It's not "elitist", it's principled. The only question that matters is if a business practice is violating fair market principles and relevant laws or not. "What about my grandma" is not an argument and not relevant to the judges' judgement. The world doesn't revolve around OP's grandma.
Furthermore, the most potent attack vector was, is and will always be social engineering, which is much more likely on smartphones than on dumb phones. So if it's not concern trolling, then the obvious move is to buy a dumb phone for grandma instead of depriving everybody else of their freedoms and rights.
It is absolutely elitist. It is rich hearing from privileged folks with advanced degrees say how their "principles" are being violated. This is just another example of a small elite being comfortable with the non-privileged suffering just so they can enjoy their hobbies.
What a strange non-sequitur. I did not say that "my principles" are being violated, but the principles of U.S. economists, judges and relevant authorities in the United States and their views as to what constitutes a fair market. A brief study of the history of anti-trust cases should suffice to cultivate some understanding regarding those principles (see United States vs. Paramount Pictures, AT&T, Microsoft et cetera...)