I don't think that conflicts with what I said but perhaps counters with something I didn't; your ebike analogy implies a recklessness that the junior with the a

I don't think that conflicts with what I said but perhaps counters with something I didn't; your ebike analogy implies a recklessness that the junior with the attributes I mentioned will be averse to. Conversely the senior with the full grasp of LLMs and the "taste" and judgement will naturally be ahead. But the comparison I made was between the junior with a good attitude and expert grasp on LLMs, and the stick-in-the-mud/disinterested "senior". Those are where the senior and junior roles will be more ambiguous in demarcation as time moves forward.