The ratios of different types of fats in oils (e.g., saturated vs unsaturated, mono- vs polyunsaturated, etc) do have different metabolic processes and effects, that's not any kind of new-agey or faux health stuff.

The level of impact of such things is definitely still actively studied, but some fats do generally seem worse for you to consume than others.

Now, anyone arguing eating a bottle of olive oil a week will cure your cancer is obviously full of it, but choosing different oils because of ratios of saturated fats and what not isn't entirely new-agey fluff.