When the term "essential worker" was coined, it made many of the people it applied to feel flattered. They were considered essential! However this is a misunderstanding of what a capitalist is saying. The term "essential" doesn't actually refer to the worker. They consider the work essential. It is very important that those jobs are carried out. The worker that does it though is irrelevant, and considered fungible.
You know how corporations have a department called "Human Resources?" That's exactly the mindset. Your job is essential, but you are expendable.