Okay, first you need a civics lessons. Capitalism isn't a governmental system, it's an economic system.

This economic system is widely used across the world. This includes most of Europe. Acting like this is just an invitable part of capitalism ignores the fact that the government can pass laws to create a social safety net.

They did. People living at or slightly above the poverty line have dental coverage through Medicaid. People with income above that threshold and no not have dental offered by their job have access to subsidies through the ACA.

Are there people who can't afford dental? Sure. America is a massive country. However acting like it's in any way common is insane.