I must disagree, although I find what you are saying an important part of the defenses, and likely a larger issue in certain parts of the country and certain neighborhoods..
I think the gp is not 'absolutely not true'.. I have a fair amount of hobby interest experience dealing with petty thieves / criminals for the past couple decades; studying them locally and through polls and news articles... stories about locked up thieves admitting they will generally skip houses that have big dogs and security systems for example.
Certainly there are certain types of people to take into consideration from what you are mentioning, and petty criminals vary from locale to locale in significant ways sometimes. From what I understand places like frisco often have car hoppers busting out windows of cars on a regular basis, however in my area they generally only check for doors to be locked or unlocked when choosing to rummage through a car. A portion of the criminals around here will make an exception and bust a window if they see a purse or briefcase, but generally move on to the next without making too much noise, for example.
In most neighborhoods seeing someone crouched down playing with a door lock would attract attention and likely calls to the police. Kicking in a door would also create an amount of noise that brings attention the average criminal does not want to deal with.
Sure if a delivery person has seen you have a box of gold and sapphires next to the door (or notice your vintage guitar collection hanging on the walls while trick or treating) - they may target you with a door kick / other means of juice that is worth the squeeze..
but most of the thieves in my area will skip the locked houses and move to the next softer target. (often ringing the doorbell to see if anyone is home first)
I don't think most petty thieves are willing to learn lock-picking, even though it's easier to learn today than it was 20 years ago.. The added time it takes is not really worth it. (for most in most situations)
It's easier to find a neighbor that has a window air conditioner that can be pushed in with ease (at least around here, this technique in Minnesota may not be used as often)
The only place I can think of in regards to "establishes a particular legal status of the property behind the doors, with associated consequences for unlawful entry." would be Kennesaw, Ga - every person who lives there has a gun - there, the legal status of kicking in a locked door and it's associated consequences are proportionally different than most apartments in NY.
Some of the street thugs know that robbing with tools (that can be labeled burglary tools) carries an extra charge, just like robbing with a loaded gun is different time for the crime of stealing using threat of other force..
I do agree that certain situations / threats make "The additional, secondary role of a lock is being a trivial inconvenience. Not enough to deter a thief determined to rob your place, but enough for a thief determined to rob a place to skip yours and pick a different one." true - but that does not make the above statement absolutely not true.
I think you are both right.