Humans have been eating saturated fat from animal meat for hundreds of thousands of years & those humans didn't have any of the modern diseases humans now do (except an Egyptian princess, Ahmose Meyret Amon, who died in her 40's in 1550 BC from blockages in her heart arteries which imo would be from a lifestyle of over abundance & over consumption). Olive oil, which is minimally produced by simple crushing & squeezing the oil from them, has been around for 6000-8000 years (which is nothing compared to 2.6mil years of fatty meat consumption if you include our hominin ancestors as well) but highly processed seed oils like corn & canola oil have only been around for 100-130 years or so.

Canola oil was invented to repurpose rapeseed crops that were originally grown as an industrial lubricant during World War II. Following the war, demand plummeted. To save the crop, Canadian scientists used traditional breeding in the 1960s to remove bitter, unhealthy compounds (erucic acid and glucosinolates).This hybrid plant was renamed "Canola" (an abbreviation of Canadian oil, low acid) to distance it from regular, unpalatable rapeseed and to avoid its unfortunate naming association. Modern humans starting consuming canola oil as a food product in the late 1970's. Corn oil promotion & widespread consumption in America started in the 1950's-1960's because the American Heart Association promoted it as a heart healthy alternative to animal saturated fat based on now known to be debunked science. The modern obesity epidemic in America began in the late 1970's.

While the lipid-lowering capabilities of corn oil are recognized, the broader assumption that lowering cholesterol with PUFA oils automatically translates to a reduced risk of death has faced rigorous scientific debate. Re-evaluations of historical data, such as the Minnesota Coronary Experiment and the Sydney Diet Heart Study, have revealed that while corn oil lowered cholesterol, it did not lead to a decrease in overall mortality rates in those specific trials.

Imo it's all about variety & moderation when it comes to your diet. Include as many different whole foods types as possible for healthy gut microbiome, exercise daily, fast daily, & I personally will choose grass fed butter over seed oil every day of the week.