Re: Problem-solution dichotomy
"It gets me that the VERY NEXT ACTION you take is to touch the door."
1. remotely unlock car
2. lock front door of house
3. walk down driveway to car that the wife and kids are now already in
4. open drivers door of car
In this all too common scenario I count two distinct and non-trivial actions requiring a non-insignificant length of time to complete between unlocking the car and touching the car. Now sure, we could just remember to give the car keys to the wife, or we could let them deal with locking the front door, either of which would then allow the "very next action" scenario you're thinking about to occur, but back in the real world this is the routine that for one reason or another we've fallen into, and it works for us. It wouldn't surprise me in the slightest if other people have similar scenarios where being able to remotely unlock their car is a genuinely useful feature for them too.
In a similar vein, being able to remotely release the boot lid is a godsend when returning to the car with hand/armfuls of shopping, suitcases etc, which would make it impossible for you to use a physical key or bootlid release button on the boot itself without first putting stuff down.