Tech companies are operated like any other company and have a wide range of employees. Also not every tech position is highly employable. I know from personal experience in tech middle management that many employees are very easy to replace and have very common skill sets that are oversaturated in the market. Many many tech workers are absolutely operating in survival mode in 2024.
I think there is some confusion here between copyright and patent, similar in concept but legally exclusive. A person can copyright the order and selection of words used to express a recipe, but the recipe itself is not copy, it can however fall under patent law if proven to be unique enough, which is difficult to prove.
So you can technically own the patent to a recipe keeping other companies from selling the product of a recipe, however anyone can make the recipe themselves, if you can acquire it and not resell it. However that recipe can be expressed in many different ways, each having their own copyright.