There are car key amplification attacks where people leverage the remotes in peoples homes to break into cars. In the past there have been car brands that only had so many physical key skeletons that thieves would just acquire them all. Homes often have windows that are smashable and very pickable locks.

Perfect security doesn’t exist, especially as the consumer level. I have more faith in software updates.

The first is not an issue if the transmitted data is time-sensitive.