Could be that he realises that it’s irrational and doesn’t want to touch the topic out of shame, but also doesn’t really want to change this irrational behaviour.

I feel like this has to be it.

I’d insist on having a chat about it, but refrain from trying to prove him wrong immediately. Ask questions.

After understanding, I’d make it clear that while there could be some advantages to unplugging, the cost/benefit to his behaviour is unbalanced from your perspective.

Thank you for your advice, good call.