They could also just shove a piece of gum in the pitot tube. Most Light aircraft don't even use a glass cockpit still, so aren't vulnerable

Yes. Which was my point. They were purchased because of their perception in the market, not by the quality of their products. Ie. Marketing (which is similar to most of Bose's products with exception of their noise cancelling gear). They weren't always owned by Apple. And I don't think that was the long term plan by Dr dre either originally..