There are a bunch of extra security features most of the "burn the strawman" hand wringing articles on this skip over.
My sensors do not work in isolation. The car "knows WHERE the key is", not just that it is present. It can, very accurately determine, for example if the key is inside the car in the drivers hand or outside the car in the drivers hand 3 inches away.
As an example, on a "normal" car use, if I pull up at the house, turn the car off, open the door ... then without getting out I shut the door and remain in the car with the key... the automatics are predicting that the next thing I will do is lock the car. So it immediately starts beeping gently. If you do try and lock the car while any key is inside it, it will BEEP much louder. "No." is the very clear answer. I have fought this and swore at it. "Lock the car!" and it says, "No." Eventually I end up going, "OH... wait... no... you are right my key is my coat pocket on the passenger seat.
To open the door in a passive way you need to be within 1 meter of the door handle. If I stand at 6 ft and ask my daughter to open the door, it will not open. If i close within 1 meter, it will allow her to unlock it.
If you accidentally unlock the car by .. say... touching a door handle after locking it, it will automatically lock itself after 5 seconds unless you open a door. Inversely if you look the car and try to open a door within 5 seconds, it will prevent you. Allowing you to confirm the is actually locked. Personally I listen for the mechanism and watch the side indincator flash.
Can this be hacked? Probably. Is it going to be a profressional car jacking outfit that does it, very probably.
Paranoid? Faraday wallet. Test it. If it fails, by another more expensive one.
Personally, on occasion I will put my car key in such a wallet. If I leave it by the back door, there is a farady wallet to hint to me to put it in there. This is not 100% for security, but so that the car can sleep like a baby and not have it and the key wake each other up all night, which does wonders for boths batteries.