Considering this been going on since the Model S (which also has the same issue with the quarter window smash + unsecured rear seat latch), it would seem Tesla is not interested in spending any time and money on fixing this.
Well, let's see... a clear physical security flaw in their product that has existed for years hasn't been addressed. Instead of addressing it with a change in hardware, they decide to burn software engineering hours to build a very complex alarm system (which also doesn't work well based on the reviews).
In Tesla's words: "While no alarm system can prevent against all vehicle thefts, break-ins and threats, we hope that with Sentry Mode and our other security features, your Tesla will be even more secure."
In other words: "We made you a free fancy alarm you didn't ask for. I hope you feel better about your car."
Car alarms have been a joke since the 90s. When one goes off in a mall parking lot, nobody listens or cares. Quarter windows will continue to be broken, and only a matter of time that USB sticks will get stolen too.
For all that Tesla gets right, they try way too hard in the hardest way possible to fix things that have obvious or easily accessible solutions.