I see what you mean. Definitely we're talking about two different overall ways of looking at the film - or just two different questions about the film I guess. For what it's worth, I reckon what you're saying is most likely right, I don't think he planned it all out with all those ideas mapped out like answers in a crossword - now a bit about racism, now some sexism stuff - I'm guessing (and I think that this is what you're saying), that he just made the film that he had in his mind and those things were kinda suggested at one time or another cos those were his preoccupations at the time and they couldn't help but appear.
To me that raises another question. I wonder if when someone makes a film in that way they think "I'll make this film and, just because of who I am and what I'm doing, there is no chance that my thoughts on colonialism (say) won't manifest themselves at some point" - in other words, it was still a conscious decision, or at least something he was aware of in advance and he just let happen. Or do you think he watches it back and goes "oh look, my concerns about colonialism came through there and I hadn't even planned it" - perhaps that's a pointless question really, most likely it's a spectrum across directors as a whole, and also across individual directors at different times. In other words (boring answer) sometimes it's more deliberate and sometimes it isn't. And some directors tend to do it more deliberately more often than others and some less. Meh.
Also, thinking back to what I said above about how directors use their technical skills to produce scenes that are supposed to visceral or based on feeling.... perhaps that's an almost entirely trivial point, of course directors use their technical skills to make films, and if they are going for a scene that is supposed to engender an entirely gut response in the viewer that's no exception. Although on the other hand, maybe it is possible for directors to overthink such scenes within the parameters that they necessarily have to work with.... perhaps I'm just rambling now....