I found this definition of magical thinking on the web:
Magical thinking is defined as believing that one event happens as a result of another without a plausible link of causation. For example: "I got up on the left side of the bed today; therefore it will rain." The problem with this definition, however, is that exactly what constitutes "a plausible link of causation" can be difficult to pin down. If we were to take this phrase to its logical extreme, we'd have to consider a belief in anything that hasn't been scientifically proven to represent magical thinking. On the other hand, rejecting the use of any and all criteria with which to judge cause and effect leaves us vulnerable to believing that anything can cause anything—or even worse, that an effect can occur without a cause at all.
Perhaps, then, a more nuanced definition of magical thinking would be believing in things more strongly than either evidence or experience justifies. Though I can't prove the sun will rise in the East tomorrow, because it has every day since I've been alive, such a belief couldn't then be said to represent magical thinking.
What I like about the quote is that it supports your statement:
if you think a certain way, instead of thinking the way we think is "right" for everyone, then there must be something wrong with you.
but also shows why therapists might constantly come back to your statements:
To tell someone they need to keep their thinking in a strict margin is very limiting ... The logic in my mind is that, as long as I'm hurting myself, I won't have time to hurt other people.
Magical Thinking often takes a binary either-or form. It ignores that most things we think are false. In fact there is a saying that some of what doctors knows is false, we just don't know what parts. A similar quote I have is "The future is here, it's just not evenly distributed".
In a very general sense I am using the words magical thinking as a shibboleth. To say that a thought is wrong because there is no evident causal basis for the thought is to deny a thinker's freedom of thought. (Denial of freedom is often based on magical precepts

) On the other hand a therapist believes that there is no necessity for a person to deliver a fated amount of pain in their lifetime. Yes, existence is suffering, but that does not mean to exist we must cause pain to either ourselves or others.
Similarly because someone believes that does not mean that you need to stop hurting yourself immediately. To me what that thought means is that you can acknowledge the possibility that sometime in the future you can stop hurting yourself. That not self hurting is a possibility for you, if only a remote one.
Medical practice takes is actually determined by this rejection of freedom. If you have a painful disease Drs will prescribe medicine to alleviate that pain. There are bureaucracies that monitor those decisions, since some Drs. are more likely to prescribe than others, and some agencies attribute this to greed. Who is to say that this isn't "magical thinking" that limits the amount of empathy a Dr. can feel for their patient? WELL ... I choose to say that, in the same way that I make similar inferences about other "shady" people who make general declarations about their "right" to do harm.
As consumers we have the individual ability to decide what makes sense, but similarly we also have the ability to evaluate other's decisions as being logical or non-logical. Societal rules are based on what enough people agree is logical, even though other people think the rules don't make sense.
The cool thing about logic is that has proven the problems that it can solve are fewer than the total number of problems that exist. There is a LOT of room between the statement "that's not logical" and "you are wrong in a fundamental sense". I acknowledge that I am often wrong, but I guess my most basic tenet is that even though everything is, that does not mean that everything will be the same tomorrow. I strive to maximize that difference in a positive way, but since I am often wrong things don't always work out.
Thanks for letting me explain my point of view Specter. I would never say that your point of view is wrong, any more than I would say that your point of view makes mine wrong for me. I hope we can agree to be different in our own ways.
I will try not to use the words "magical thinking" in follow ups to posts that you make ... I'm counting on you to say "There you go again ... " if I forget. The one thing we agree on is your way of thinking is your own.
(((Hugs)))