Nowehere does the rambam say that YOU should learn philosophers. He actually writes in the same hakdama that he did it so that Jews wouldn’t have to search elsewhere for hashkafa – there was a lot of, aptly named nevuchim – confused people, who were into philosophy. It’s true that the rambam holds one is mekayam vehashayvosa al livavecha through philosophy, but even that’s only A) people who have filled their “stomachs with shas and poskim” and B) about yichud Hashem, which brings me to my next point – the rishonim who were busy with philosophy were studying logic and concepts to understand emunah. Nowehere does the rambam get his morals or values from Aristotle. See the first bartenura on pirkei avos – he says that avos starts off with the chain of mesorah because you shouldn’t think that ethics and morals are a free for all with the rabbis making things up as they see fit or according to their own understanding. Rather, he says, just as every other mishnah is torah she baal peh, so too are middos and ethics – purely Torah.
That’s a huge distinction.