Not just security
It is other safety and practical issues related to the stupid muppets in marketing, etc, deciding that everything must be push-button and app-controllable along with a move away from simple low-risk control approaches. We have in no particular order:
Toyota ECU design faults causing runaway and crashes
Ford recall as "off" button not stopping the engine (WTF was wrong with a switch in the MCU power line? Same question to you Toyota?)
Jaguar door unlocking silly buggers
And on, and on, ...