What Am I Missing with RTTs?

I just don't understand the use case to justify the prevalence of large cost, bolted on, top heavy accessory that as far as I can tell... doesn't really solve a problem.

Sure, if you were actually in a desert full time with creepy crawlies to avoid AND you were really at a premium for tight vehicle space AND you explored the desert for 10 days of every month OR you were doing a 1980s overlanding journey (like driving africa for 3 years) ok, sure I could see how that might be a lifestyle upgrade. But... for anything else? It's suuuuch overkill, while also being expensive, inconvenient, and adding a not-insubstantial amount of top heavy weight to your vehicle.

And every RTT I've seen is equally or more finicky than my MSR tent, requires a ladder, means your car is immobilized while deployed, requires level car parking space, and in many non-scorpion environments doesn't really provide "safety" from critters.

So I ask in earnest: am I missing something or is the popularity of RTTs mostly lifestyle related?

and fwiw I camp a lot and live in the rocky mtns. And as get older I am more and more open to making my camping set up a bit more comfortable, so it's not like I'm a die hard minimalist here. For example one of the huge selling points of getting an LR3 is the ability to lie the seats truly flat and put an air mattress in there for a bit more comfort in certain terrain and for actual hard-bodies safety in Grizzly country (a few campsites won't even allow soft tents).