What do you mean by medical advancements? It's not a simple relationship. Hand washing and public sanitation were huge advancements but European life span was low at that time. Human history varies by geography.

You assume life expectancy is tied to advancement. It's not but rather correlated to access. The life span plummeted after Enclosure and early industrialism. Only rising after public health demand. Agriculture is correlated with those modern diseases. That's why they wiped out indigenous peoples.

Big assumptions about the necessity of progress and its actual gains for human development.

Climate change is exacerbated if not caused by industrial capitalist growth.

The fires are a result of that capitalist growth. Socialism produces for need. Capitalism produces to return an investment. It REQUIRES growth. And it requires good people like you to believe that growth is necessary for stability. Growth is not synonymous with prosperity.