It's not about Disney being less creative or less bold or whatever than Fox, it is the context of the cinematic universe and how much it constraints in order for us to have a solid enough foundation and then reap the reward in Infinity War for example.
I'll give you Guardians of the Galaxy (to a certain extent), but despite amazing visuals, Doctor Strange is nowhere near as bizarre and fucked up as it could have been, for one, you need to keep his power levels in check, right?
Same thing happened in comics, when Doctor Strange was this weird little corner, he had OP powers over reality and doing crazy Englehart-doing-LSD storylines, but then you want him to play along with the larger marvel universe and he becomes more like a "magician" instead of the sorcerer supreme who interacts directly with eternity and can manage to recreate the entire universe if you need.
I don't think worrying about how putting these properties in the context of the MCU machine will impact creativity is close minded, I think it is reasonable to assume that, since they are part of something bigger (assuming you want them to be part of something bigger - the netflix shows are their own little corner for example), then they have a kind of "brand responsibility" so to speak.