I feel inclined to agree with the Rambam. The occult in general seems like primitive superstition. If fortune tellers actually are fortune tellers why do they prostitute their talent at fair grounds. Why not go to the race tracks and do the stock market they could make zillions! Ouija boards would be more convincing if they got the ghosts to move the glass around hands free. However the Rambam's opinions are not commonly held in Judaism and my Hasidic friends told me that the Rambam was mislead with his studies in greek philosophy. They said only his halakic books are valid and I should stay away from his Moreh Nevuchim.
The egyptian sorcerers in tenach sound rather convincing magicians, but I think the RAMBAM believed it to be illusion (that's what I recall from a criticism by the RAMBAN)
Moreh Nevuchim was intended for people already into aristotle, because the danger at the time was that people reading it might go along with what philosophers tell them. So the RAMBAM wrote the book to reconcile Torah concepts in the minds of one influenced by philosophy of the time.
The rabbis that opposed him weren't like charedim.. they had some good reasons to be worried..
I vaguely recall, that one thing that scared the hell out of the rabbis of the time, was that the RAMBAM said that if it can be proven that the universe did not have a beginning, that the universe was eternal, always existed, then the Torah would be null and void. (Well, philosophers never proved that, and currently scientists say the universe had a beginning)
Another fear, was that people would go to the philosophers. Well, that whole school of philosophy that the RAMBAM Was addressing , is not so strong anymore.
So these concerns of then, do not apply so much now.
The Charedim just want to block out the outside world..
It is as if, they say, there is a flood outside like in the time of Noah, and our homes are arks, and we must seal them up to prevent anything non-torah from entering them. They have this extreme philosophy.
But they would also be against television and internet(outside of work)..
They are protecting their community, and being far stricter than necessary. Going way beyond what is required.. It seems to work actually. It does protect the Torah. But at a cost.
Since peoples' understanding of Aristotle is not leading people astray nowadays, people don't study his theories on the universe..
I don't think reading that will cause a problem. The concerns of back then regarding reading that, do not apply today.
But there are some things in The moreh nevuchim, which have nothin to do with Aristotle.. And they are very beneficial to read.
For example.
Looking at the mishneh torah, hilchot kiddush hachodesh, the RAMBAM appears to talk about the sun rising and setting, and he talks about things as if he believes in a faulty cosmology..
The publisher is good, and the commentary, by an orthodox rabbi of course, even says "well, this is a big question. Maybe he was just basing what he wrote on the knowledge of the time.."
Yet.. I found the answer to the problem within Moreh Nevuchim.
The RAMBAM said that we (people at that time) do not know the cosmology.. But, the hypothesis(that e.g. the earth goes around the sun), is fine since its calculations work. And they use that. It's the calculations that are important, and the hypothesis, whether correct or not, is accurate. So yes, he didn't know that the earth went around the sun, but he didn't believe that the sun went around te earth either. He just said we don't know.. But this hypothesis works and so we use it. (And sometimes a simpler picture that gets the results and lets us calculate the results, is easier than the real thing anyway, and of course, fine in this case)
Here is another example.
In the moreh nevuchim, he discusses levels of prophecy.
Nothing to do with Aristotle.
And he discusses Nevuah, and why books like Psalms are in Writings and not Neviim. Because Psalms(Tehillim) was written with ruach hakodesh, not nevuah. Nevuah is in visions and dreams. So he does explain many things in there.
It's not dangerous but charedim are excessively strict. To protect their community. They keep everybody sharply in line!