at the very least, doing code reviews of jr developers gives one (of age/experience) the satisfaction that the mentoring is going to produce a better developer who can take on bigger tasks, eventually start reviewing others, and the company experience continues to grow until the obligatory pointless layoffs to boost the stock price.
you can't trust an AI to truly remember anything you tried to "teach" it if it even got a look at your fixes of their crappy code, because even if it did, the next version of the bot's engine may need to be retrained from scratch as it "forgot" almost everything. Plus, it is REALLY hard to get AI to understand general code design philosophies like "3 strikes and you refactor" - it is designed to regurgitate first, not solve problems by increasing the use of shared code. I look at some AI results and all I see is tech debt that will eventually kill the product but never get fixed because nobody quite understands the original task it was trying to do when it just did 'copy and mod'.