The difference being that I can scrape the data of ALL my competitors since 2008, get the number of likes and comments of every single comment and automatically generate graphs of the data. Thousands of man hours in one minute.
This gives an unfair advantage to the tech-savvy "hackers". Facebook terms protects against this. Thus scraping it is disallowed.
I couldn't say if it would be moral or immoral to do this. Personally, I'm more concerned about the well being of poor scraper program that has to scrape through an entire decade of Facebook posts. Poor thing.