I don't think opening a door the wrong way hundreds of times is a literacy issue....

Pulling a door labeled push is the result of bad door design.

But it mostly sounds like you can't think of your own ammo and wanna be a dick to your coworker.

“pulling the same door labeled push”

In this instance, it’s usually a basic design problem. If you have to label a door “push” because some idiot put a handle on it that you’d instinctively pull on instead of a simple push plate that’s impossible to grab, that’s not the user’s issue.

The example you've given is likely not a problem with reading comprehension but obliviousness. I read and understand things very well (I have to read and correct engineering drawings and schematics and implement them), but I simply don't notice a lot of what goes on around me.

My suggestion for that is any job that doesn't require safety, physical team labor, or security.

Republican member of Congress, president.

If it's a legitimate issue of illiteracy there are companies that rely on illiterate workers and workers with other special needs to legally shred their sensitive documents. It's amazing for both sides. It takes the concern for privacy off the table and gives a person a job, money, and a sense of purpose that they otherwise might not have.

In an age where most information is digital there are still a lot of industries that rely on paper and for sensitive information and sometimes that paper needs to be shredded. Legal documents, HIPAA standards in the US, and trade secrets are the ones I can think of off the top of my head.

The job they have now. If they're not getting sacked they're obviously fulfilling their employers expectations.

Dishwasher, cleaner, cook in a smaller kitchen.

At least those a friend of mine did who came already illitterate from Afghanistan to Sweden and also didn't learn to read and write in Sweden yet (despite being very good in speaking the swedish language after a couple of years.)

Seems more like an attention issue than illiteracy.

Congress

Well that depends, what causes this difficulty in reading and how far does it extend? Is it dyslexia? Do they have issues memorizing things? Are they completely beyond learning a fixed action?

A politician

Porn

The same door...? Their apparent illiteracy sounds like a symptom more than the core issue.

pulling the same door labelled "push" for the hundredth time

I was about to say that maybe one side of the door has the wrong handle, before remembering that glass doors usually have the same handle on both sides...

Let’s keep this door related. Walmart greeter

To answer your actual question: functional illiteracy is still functional, if somebody has a job, and they're keeping it, doesn't matter if they can't really read. Most people can cope without doing any reading in their daily lives, they'll ask somebody else to read something for them if it's absolutely necessary, but there's a huge part of humanity whose jobs do not involve ingesting novel data and critical thinking.

Quite honestly even the people who do need those critical thinking skills don't need them on a day-to-day basis. Most people get into a routine and don't really need to read anymore. So somebody could adapt to that routine through friends and family, and never really learn how to read.

Now to move on to your scenario, which isn't based on a literacy, just on somebody being oblivious and or stubborn. Those people existed all levels. Just let him be. Don't let them annoy you. Arguing with an oblivious stubborn person is a double whammy, because they don't realize whatever they're doing is inefficient, and if they do eventually get it, they're going to double down because their stubborn

Barback.

Prep cook.

Custodian.

Facilities teams.

Driver (delivery, Uber)

Trainer

Retail

Mover/moving company

Salesman (for specialty items like guitars or cars).

Farmhand.

Auto body shop work

Welder

Street performer/artist

So many jobs don't require the ability to read, but they almost all require that you acquire a skill or knowledge base.

Washing cars for Avis. When I did that one of my coworkers was illiterate. He managed just fine. Only thing he had to do was memorize the few questions on the return slip to know which checkboxes associated to which aspect of the car’s state.

Escort.

School

Production line worker, depending on the production