This is a good point and imo there is an interesting tension between adaptability and specialization.

Stable environments naturally drive populations towards more specialized actors in niches as they benefit from efficiency. Think of leverage in the financial economy or the dinosaurs.

When a big system disruption inevitably arrives, you better hope you still have some depth around with adaptable general populations that can survive the crisis and occupy the new environment. Think of Minsky moments and the K-Pg event for the dinosaurs 66 million years ago.

Another example would be stem cells vs organs and their specialized cell types.

It seems to me like you need enough regular change to avoid overspecialization and preserve the ability to survive large changes.