No form of writing benefits from purposefully making it longer and harder to read. You might be writing about complex topics, but you still want to strive towards simplicity. As simple as possible, but no simpler.
Random example: https://www.ironteethserial.com/dark-fantasy-story/story-int...
Are you morose? Perhaps you are sad, very sad in fact, but find that you are neither glum nor morose, not disheartened nor heartbroken, not anguished nor stricken, not unsure of how you will go on nor distressed, and neither grieved nor aggrieved nor yet maddened with grief. Perhaps your feelings of sadness are to be expressed quietly and without intruding.
If you just slap them down anywhere then you end up with a sentence like "Obscurantist verbiage is a calling card of the intellectual qua gatekeeper, in that necessary role serving to further the creeping and not unimpenetrable calcification of human linguistic torture" and anyone who has to read your writing will wish you were dead, which is bad, or copy you, which is worse.
But if you don't, or if you can reasonably use simpler words, don't use the big ones.