For example, leetcode may be very appropriate for those programming jobs which are fairly standard. At every job you don't need to invent new things. Industrialization was amazing because of this standardization and ability to mass produce (in a way, potentially LLMs can be this for code. Not quite there yet but it seems like a reasonable potential).

But on the other hand, there are plenty of jobs where there are high levels of uniqueness and creativity and innovation dominate the skills of repetition and regurgitation. This is even true in research and science, though I think creativity is exceptionally important.

The truth is that you need both. Often we actually need more of the former than the latter, but both are needed. They have different jobs. The question is more about the distribution of these skillsets that you need to accomplish your goals. Too much rigidity is stifling and too much flexibility is chaos. But I'd argue that in the centuries we've better learned to wade through chaos and this is one of the unique qualities that makes us human. To embrace the unknown while everything in us fights to find answers, even if they are not truth; because it is better to be ruled by a malicious but rational god than the existential chaos.