Once you have the slightest clue about the law, it's easy to just laugh it off. The problem is, most people don't know any better, so these tactics are incredibly effective a lot of the time.
However, you do get a truly lethal combination when you combine an asshole lawyer with a well-funded client. That's not because it's some highly intelligent, sophisticated legal team who can craft superior legal arguments. Rather, it's because they can simply brute-force their way through by outspending you.
It doesn't matter how legally "right" you are if you're not willing/able to spend the money in court to prove it. A lot of people take advantage of that, including the asshole lawyer (who, of course, profits from it).