Yes. There have been years when cooking has been the only way to afford enough healthy food. I prefer my own cooking, partly because it is familiar, and reliably vegan and low in chemical pollution. I buy a few prepared condiments, but sometimes make pasta sauce from scratch. I always make my own bread, sprouts, granola, hummus, and sweet treats. I'm learning how to store vegetables for the winter, and sometimes grow my own.
When I was young, we didn't get regular stories about clogged toilets and other digestive outrages. I'm sure that junk food is involved. I'm astonished at what people will put into their faces if it comes in a package, but the corporate cooks are very cunning. To avoid such hazards, I also have a full miniature kitchen in my car.
I have seen the world population triple, but our ideas of how to eat were set by my grandparents, still heavily influenced by life before we had trade and food preservation. If we don't give up meat, we will have far more extinctions before a human population crash. Just sharing a building with dead animal parts shuts off my digestion now.