Learning “on the job” is an anachronism from the days when companies invested in their employees and employees stayed in the same organization for their entire career. We’re moving towards the gig model, even calling programmers “rock stars” to sell it.
This is profoundly true. It's also one of the reasons I want to get out of IT after 20 years. I'm past the point where I'm tired of the meetings, false niceties, and desire from management to submit to the hive mind. Nothing worse than stand-ups, Teams or Google Meet meetings. No one wants to be in them. It takes time away from my job where I could actually be productive. This is why I really like the videos from Patrick Shyu on YouTube (Tech Lead). He gives the skinny on working for companies like FAANG and in general. I don't always agree with everything he says, but I've seen much of what he says.
Surprisingly a lot of folks on my past and current teams haven't figured this out yet. They still think the manager who promises them a promotion next year is going to be around by then.