You know, we always hear about people this stupid. Oh, I'm not a grocer at the grocery store - so these companies aren't about to replace me! I'm truly one of a kind.
Oh lawdy, is this the kind of shit you tell yourself daily in order to tell yourself that you're needed? You're more of a disposable widget than a widget itself.
Unless you're a former CEO for a HUGE corporation, you are more than god damn replaceable. You are more replaceable than a grocer clerk. Why? Because in 'Merica people are too good to be a grocer clerk. The main competition in jobs IS in the white collar world. But keep fooling yourselves. You're one of a kind. You weren't interviewed along with 50 others. Your resume wasn't submitted along with 5000 others
Hiring and training someone costs a lot of money. The new person is essentially useless for a week or so while they learn the job. You have to pay them for that time. You may also have to pay to have them move. You also pay 100% salary for the first month on the job when they are operating at 20%-90% efficiency while they learn.
If you want to get rid of someone, you have to pay for the downtime, the search, interview time, and perhaps severance.
And you have to make sure you hire the right person the second time or else you'll have to do it all over again.
So yeah, if you find the right person with the right skills, they aren't easily replaceable.