You are being חושד בכשרים. I came across this piece of Rabbeinu Saadyah Gaon because my father showed it to me. I came across the תשובה from רב נטרונאי גאון where he says that Chazal did not know medical science because my father showed it to me. And it’s not just those two גאונים: Rav Shmuel bar Chofni Gaon, the Redak and Abarbanel all feel free to reject Chazal in matters other than Halocho. And Rav Zev Wolf Einhorn, the פירוש מהרז״ו on מדרש רבה, says that Chazal believed in a flat earth. (I came across this when learning, not by doing an online search.) There are many others; you know where to find them.
And this is not a question of psak, where we (generally) follow the Remo. This is a question of מציאות, which by definition cannot be paskened. If the Remo would pasken that the earth is flat, would you accept that too?
There is nothing I do because of these beliefs that I wouldn’t do if I thought all of Chazal non scientific statements were true.