Earlier quoted context omitted.
Why do essential workers all have to be valued on an equal basis as firefighters, doctors, etc? Because that's what the word "essential" means: Things you can't do without. Not "things I really really really like." How are you measuring value? People who save lives > people who don't save lives.
Both firefighters and doctors are a relatively recent “invention”, I’d say 100-150 years old (with the medical profession being re-invented after a first stint back in Antiquity). As such there’s nothing “essential” about them, you could say that bakers, fishermen or even sex-workers are more essential than doctors and fire-fighters.
It's a pretty twisted definition of "essential" to include only the things that are definitely going to kill you if you go without and not to include the things that just might kill you.