Because it's been trained on decades of StackOverflow and forum posts. And because while some command line tools go in and out of fashion, quite a lot are very

Because it's been trained on decades of StackOverflow and forum posts. And because while some command line tools go in and out of fashion, quite a lot are very stable, so their use will show up all the time in the training material. Since it's all statistics under the LLM hood, both of those cause proven CLI tools to have strong signals as being the right answer.