Also, I don't think people who go on diets to try to reduce their LDL count is such a bad thing. Obviously if they don't eat food that has the ONLY essential fatty acids (linoleic linolenic and arachidonic acid) they need, then obviously they're idiots. You need these
essential fatty acids everyday, hence essential. I think the diet you're referring to has more to do with not getting enough fat necessary for the body to function properly, rather than a reduction of overall LDLs. However, even if they did reduce LDL levels, and increased HDL levels, I don't think it would affect a person too drastically (or even in a negative way
at all), unless they went overboard and just (pretty much) stopped consuming foods with fat. HDLs are very good for the body because they supply a LOT of apolipoproteins (APOs) that a) bind to cholesterol to inhibit the formation of cholesteryl esters and b) act as marker, so that the liver can absorb this cholesterol to convert it to bile (which the body needs for the breakdown of foods in the small intestine and large intestine to reabsorb nutrients/ions).
And lastly, all fats are not bad. You need fats in your body. There is absolutely no way you could survive (optimally) without fats. Either research on the topic or try it yourself before coming here and spouting nonsense that is a legend that somehow the majority of people want to cling onto to somehow seem like they know what they are talking about.
tl;dr Fats aren't bad.
Source: Biology major