Will Seed Oils Make You Fat

 Not necessarily. Unless you eat a whole lot of them:

 The average American consumes more than 3,600 calories daily – a 24% increase from 1961, when the average was just 2,880 calories.

Americans haven't increased their consumption of all food and drink evenly, however — our alcohol intake peaked in the 1980s, but our growing consumption of vegetable oils alone accounts for more than half of the calorie spike.

The article is from 2017 but I doubt the situation has improved. For the record, your daily caloric intake is supposed to be much lower:

Americans are consuming far more calories each day than is recommended (daily intake should be around 2,000 calories for women and 2,500 for men).