Right, which is the point: LLMs are much more like human coworkers than compilers in terms of how you interact with them. Nobody would say that there's no point to working with other people because you can't predict their behavior exactly.
That said, I do like having an LLM that I can treat like the crappy bosses on TV treat their employees. When it gets something totally wrong I can yell at it and it'll magically figure out the right solution, but still keep a chipper personality. That doesn't work with humans.
You can be professional and collaborate productively at work with people who you don't like at a personal level and have no intention to socialize with. The Mythbusters were the best example for this.
I get along great with all colleagues but I stopped joining them for coffee and watercooler smalltalk since we don't vibe and have nothing in common, so not only is it a waste of my time, it's also an energy drain for me to focus and fake interest in forced social interactions. But that doesn't mean we can't be productive together at technical stuff. I do think my PoV resonates with most people.
Human coworkers are much more predictable. A workplace where people act similarly to LLM would be a complete zoo. Imagine asking for an endpoint modification and the result is a broken backend. Or brainstorming with a PM and the reply are "you're absolutely right, whatever I was saying was completely wrong, but let me repeat it in a different manner".
As if this isn't incredibly common..?
"...there's no point to working with other people because you can't predict their behavior exactly."
Because you CAN predict coworker behavior to a useful point. Ex, they'll probably reply to that email on Monday. They'll probably show you a video that you find less amusing than they do.
With LLMs you can't be quite sure whether they will make something up, forget a key detail, hide a mistake that will obviously be found out when everything breaks, etc. Stupid things that most employable people wouldn't do, like building a car and forgetting the wheels.
Specifically they are like Julius, the colleague managers like but is a drag on everyone else.