I also recognise ‘thinking’ as a valuable and enjoyable activity - and have also obsessed about problems for days (even in my sleep)to reach a deeper understanding. But I think the issue here is the impact of AI on just that - ‘understanding’. It might be true that with AI we no longer need to have as deeper understanding in order to ‘ship’. And even if that is true I think there are plenty of other domains you can think deeply about without AI getting in the way e.g. mathematics or philosophy - where is object is often to understand in and of itself, not just the products it may generate.