They do however consist mainly of omega 6 fatty acids, and our body needs about 50/50 omega 6 and 3 in the diet. Basically omega 3 is anti inflammatory and omega 6 is. inflammatory. (too much omega 3 is not good either)

The problem with seed oils is that we mainly eat those now, as they are used in everything due to price. So we get FAR too much omega 6 in our diet. Which is bad in the long run.

[0] https://www.fda.gov/Food/NewsEvents/ConstituentUpdates/ucm62... [1] https://medlineplus.gov/ency/patientinstructions/000785.htm

Moderation might be the key word. Also the fact that it replaces something worse. Eating 2lbs of walnuts a day probably isn't a good idea, but eating a few every very days might be great for your health.