This is, to me, a very interesting question. For example, on "FACEBOOK" (I know) I have been assaulted (Do you know what I mean by assaulted?) by adds demeaning "seed oils". (The sites are of course selling other kinds of oils.) OK, so I wonder, what's amiss with Canola oil etc.? I resort to ... google and the internet. I read some "experts" on authoritative sites, and conclude seed oils pretty much are OK, probably better than other kinds, but not good to ingest in excess.
Are those experts right? How can I know? I assess their arguments with what little else I think I know (which also is mostly from experts). Is HFC pure poison "one molecule away from plastic"? Well, the latter claim is bizarre and false, but then, I learned all that stuff back when "from experts".