unfortunately, I have a feeling that in the age of LLMs, this junior on the team will have no impetus to actually put in effort and _think_ about such a problem
With LLMs, you don't even need that. Just copy paste the error and you get a response. Copy and paste the Jira ticket description and you get a response. This wasn't possible with SO. Yes, none of those will likely work straight away but the point is that less thinking is required.
Hopefully, the junior's code will be reviewed before it gets merged