Why mining towns and forestry towns rarely become very large?

Mining and forestry towns often remain small due to their reliance on finite Natural Resources, which can lead to economic instability as these resources are depleted. Additionally, the jobs created in these industries are typically seasonal or tied to specific projects, limiting population growth and long-term investment. The lack of diverse economic opportunities further discourages migration and the establishment of a larger, sustainable community. Consequently, these towns often experience cycles of boom and bust, preventing significant growth.