I think he’s saying that at the time when you’re making the prediction you can’t know. If you're gonna learn som core technology that you can use 7 years later

I think he’s saying that at the time when you’re making the prediction you can’t know. If you're gonna learn som core technology that you can use 7 years later (where he suggests programming) then this makes sense. I think there’s a strong element of luck here: even if you have general purpose skills in eg programming or CS, once a novel opportunity presents itself, you likely won’t have a head start, especially today. But what can you do about it? Telling kids who are 14-15 that they should bet on some more niched tech like LLMs or even transformers would likely be terrible advice.