Hummus, falafel, tofu, lentils and plant milks are all just family staples if you are vegan or veggie. Yes even growing up veggie and dirt poor in the 80s. Surely steak is more of a wanky ‘luxury’ item than tofu?! It’s a pound a pack and forms the basis of a lot of Asian cooking! Some really weird ideas on here. Pesto is a basic poor student meal, with pasta and a bit of cheese it makes a meal. The fact that someone can get to 50 in the Uk and never eat it is pretty shocking!
Shocking? If you are shocked by that, then feel grateful for having such a sheltered life. I have never been anywhere that pesto has been offered as an option.
It's not about luxury. Most of the listed foods basically don't taste of anything and require a shit ton of flavour to be added. So that isn't luxury, it just makes people think they are superior to have such wide and varied food choices.