She objected to the common use of the word "selfish," and used her own definition. So she would (and did) say that you should be selfish, but in the way that she defined it.

Yes and no. It certainly was "do what is best for yourself." As far as "fuck everyone else," that's where the change in era makes it more nuanced.

Imagine you've got a company that makes $X in profit. I think her position is that your company should strive to make the best product possible, so you take your profits and put some back to R&D to improve it so you can sell more. This would be done as opposed to giving it to taxes to help others that "can't help themselves." Your entire purpose as a business is to create the best product to sell the most to make the most so you can sell more so you can make more money for yourself.

Today's bastardization of that is not in line with what she proposes as an ideal state. Today, companies use a portion of the $x in profits to hire lawyers and propagandists to manipulate the playing field such that only they can exist. I think that's where she is lacking in her position - the affect that propaganda has on the market.