If you're not learning anything new, you're doing it wrong.

There's a massive gap between just using an LLM and using it optimally, e.g. with a proper harness, customised to your workflows, with sub-agents etc.

It's a different skill-set, and if you're going to go into another job that requires manual coding without any AI tools, by all means, then you need to focus on keeping those skills sharp.

Meanwhile, my last interview already did test my AI skills.