I would tend to disagree on the oils. The body needs omega-3 and omega-6 fatty acids which it can find in the seed oils but you cannot get in butters, eats, or milk products as those have saturated fats. Without those omega fatty acids you can't make a number of hormones and steroids which the body needs.
However getting the right balance of those omega-3 and 6 (and possibly 9) is tough. Focusing on only one type of seed oil and not getting a balance can be bad for you.
The next thing is the production process for the oils. Many seed oils are processed using hexane and then washed and bleached. That process if not done properly can certainly make those oils bad for you.
In that regard one of my next purchases will be an oil press so I can produce those oils myself from the raw foods. Oil direct from the source is typically better albeit more work than those from an industrial process.
Of course if you have different proof of why seed oils are bad I'd love to research it further.
Thanks for looking,
Appreciate hearing from you
RE: Taking a look at different fats for the diet.