I don't understand why you think it's an improvement. If the grandiosity was just a quirk of the writing style I'd have more patience for it but the field produces an endless stream of condescension and disrespect.
Philosophers are trained not to take such things personally, and to respond as rationally as possible even if they do take it personally. Since a lot of them also spend most their careers relatively isolated from the rest of the world, it's not surprising that they expect their audience to respond in the same way, especially if philosophy students are the intended audience.
No, it's not an improvement. I'm not trying to defend that writing style in any way. The above is just one explanation for why someone who doesn't actually mean to be condescending might nevertheless produce essays that sound condescending to contemporary readers.