I don't think musk is far off, but the problem sure is and he's aware of that at some level with his out-there analogy.
British Army Looking For Gamers With Their Smart-Tanks
Now that's a headline.
Indeed it is, smart-tanks roaming the UK streets looking for gamers would certainly headline most anywhere.
Having 3rd party sources disabled is not a safety net for avoiding issues, that's simply what makes android a google product.