Should private businesses really be allowed to dictate to us what and when we can eat or drink? If you consider that human right, I’m not sure they should.
Taking a shit is a human right but you can’t do that in a theater either.
In case English is a second language for you I will explain:
“in the theater” = the dark place with a screen/stage and amphitheater seating.
“at the theater” = the building/collection of buildings that support the screen/stage, such as ticket booths, food and drink vendors, and bathrooms
Please do not shit in the theater or you will be arrested.
Access to food and clean water are human rights, not limitless consumption of either wherever you are.
So you either smuggle it in and don’t get caught (my go-to was always a bag of chips stuffed into the sleeve of my jacket, and then sling that over my shoulder), or avoid the place altogether.
They can’t stop you from eating or drinking what you want, but they can’t be forced to allow you to bring it into their business.
However, if their business isn’t sustainable without egregiously-priced food, perhaps it should be allowed to fail. And if they all start to fail, perhaps the studios would start to lose money, and maybe they would eventually understand that it’s due to their own greed. But we all know the blame would get passed on to the consumer.