I get some of the surface level reasons, and those annoy me too. Cramming AI into everything is dumb and unnecessary.
However, I do feel that at a deeper level, it has a lot of useful applications that will absolutely change society and improve the efficiency and skills of those who use it. For example, if someone wants to learn to code, they could take a few different paths. There are the traditional paths, just read or go to school and learn to code that way. Or you could pay for a bootcamp or an online coding education platform. Or, you could just tell an AI chatbot you want to learn to code, and have them become your teacher, and correct any errors you make in real time. Another application is in generating ideas or quick mock ups. Say I'm playing a game of d&d with friends. I need a character avatar so I just provide a description to the AI and it makes it up quick. It might take a few prompts, but it usually does a pretty good job. Or if I have a scenario I need to make a few enemies for, I could just provide the description of those enemies and have a quick stat block made up for them.
I realize that there are underlying issues with regard to training the AI on others work, but as someone who is a musician myself, and a supporter of open source as often as possible, I feel that it's a bit hypocritical for people to get upset about AI "stealing" work with regard to code or other stuff that people willingly put out there for free for others to consume. Any artist or coder could "steal" the work of others for inspiration for their work, the same as an AI does, an AI is just much more efficient about it. I do think that most of the corporations that are pushing some new AI feature or promising the world or end of the labor force is full of shit, and that we are definitely in some sort of an AI bubble, but the technology itself is definitely useful in a lot of ways, and if it can be developed on a more localized and decentralized scale (community owned AI hubs anyone?), it could actually be a really powerful and beneficial technology for organizations and individuals looking to do more with less.
AI is great, LLMs are a waste. This has been the case for years before LLMs.
LLMs which the current hype calls AI are the equivalent of a scammy car salesman. To your example of have AI teach you to code - AI is awful at coding. It produces code that is the average of a junior developer's output. It will look awesome from the outside because it will often mostly work at first, but in reality it's going to be an unmaintainable mess. An experienced engineer could use one and produce a good outcome, in some cases may be faster than without and in others slower - but the experienced engineer requirement is a must. What this means is your AI teacher by itself is a junior engineer, whose output wouldn't be trusted by themselves. That's the level you'll reach and may even learn and pick up terrible habits that'll set you back.
It will do all that and consume a ridiculous amount of resources for it compared to following a YouTube course.
I imagine a similar case is true for most industries, people who work in the industry see the absolute garbage coming out of it in large quantities and have to listen to people from the outside who don't know what good looks like in that context keep saying "oh you are now redundant cuz look how good ai is".
Meanwhile, it is trained on data stolen from the people who are now losing their jobs because the idiotic decision makers are on the side of believing how good the output looks like. AND there is more, it's doing it wasting a massive amount of resources, which drives up the prices for everyone (think all electrical devices needing computers, electricity prices). But what what money are they using for it? Oh yes! The money generated out of thin air by the corporations generating this massive AI bubble, which is most likely going to end with a crash that will decimate the market (and therefore the investments and pensions of people). And if the past is any indication, the government will prop the companies up with tax money - so people will pay for it twice.