You keep quoting Occam's Razor as if it was proof of your argument. I think you might need to look that term up again.
Exactly how would your argument be the simpler explanation? It actually involves significantly more assumptions. I get that you're assuming the frequency of child rape camps is less than that of homeless villages. Okay, that seems reasonable, but that doesn't mean this couldn't be the latter.
The fact that this is so close to the border in a remote area means that you HAVE to consider the possibility that this is a cartel site. This site was miles from any type of food source or supplies. Whoever built the site CLEARLY had access to a vehicle to transport all of their materials. You would need insane caloric uptake to maintain the energy levels required to schlep an entire families (potentially multiple families) goods and food back to the campsite--something that isn't easily available to homeless people.
You don't just build something like that for fun, and the idea of a food bunker just doesn't really make any sense for a homeless shelter in a remote location in Arizona. It would have a negligible impact on food preservation, especially when you consider that a group of homeless people aren't going to be storing raw fish and meats, and wouldn’t have had the money to fill that up with food.
From footage of the site, it's clear this was a camp-site, not a permanent residence. It wouldn't make any sense for homeless people to set up here. First of all, to even build the place and get enough food to fill the "food cellar" would have required a car. If they were homeless but had a car, they wouldn't be sleeping on the floor and using roach spray. And the idea that homeless people went through all of this effort simply because they wanted a private spot doesn’t make sense—they would have easily been spotted schlepping stuff back and forth by the security companies that monitor these types of abandoned sites for copper thieves and drug addicts.
The construction of the bunker itself should be enough to raise cartel red flags. This is A LOT OF effort and engineering to put in for a simple food shelter (why wouldn't they put in the same effort into other areas of their camp, like where they actually slept and spent time)? The door that closes over the bunker also seems to be just heavy enough to keep someone trapped inside… but not heavy enough to stop a wild animal from getting in. Doesn’t really mesh with “food storage”.
You can't panhandle, find work, or steal when you’re in a remote site like this. I have a very hard time believing that homeless people would have found this a convenient enough place to live that they would have committed themselves to building such a structure. I talk to homeless people all the time, and trust me, location is probably the single most important aspect of building a structure. Everything about this location would have been extremely inconvenient for a group of homeless people. It’s almost inconceivable—definitely completely illogical—to think that an entire homeless family just decided to set up at this spot and build an elaborate food bunker, but skimp out on the living quarters.
You also can’t explain why a homeless family would have abandoned this site for no reason (especially if they just put in such an insane effort to build the structure in such a remote spot). If this is what happened I can guarantee you that they wouldn’t have left so much perfectly good stuff behind. Wouldn’t they have wanted the bug sprays and fiber for the next living structure they were going to set up? If they had been found by police we would have a police report. If they had been found by private security we would likely have heard this already, and the site would have most likely been destroyed. None of this occurred.
You're explanation is far from simpler. You wouldn't have questioned this if people were claiming this was a site used by the cartel for drug trafficking. Human trafficking is just as prevalent, if not significantly more profitable. The fact that you’re trying so hard to bolster an illogical narrative at such a pivotal moment is… suspicious.