An issue is that the early version of the FE Wiki didn't have as much technical and background information about the terms it was throwing around and expected its readers to have a physics education. Without the background knowledge, people thought that TFES was just making up upwards acceleration randomly and making up terms. To the novice reader it just looked like technobabble.
Today people read the Wiki and don't have that reaction that Eric Dubey and the early Flat Earth Youtubers had. They now learn from its various pages that the equivalence principle is a substantial principle that has been tested in different physical ways by different testing methods in physics to tell us that gravity physically behaves as if the earth is accelerating upwards. They are satisfied with the claim of upwards acceleration and find it interesting.
The early nay-sayers will eventually see the error of their ways when they come back to re-read the material, as some have. It might take someone ten years to come back to it again, but slowly more FE'ers are coming to reject those early criticisms and see that TFES has some valid points to discuss.
If a FE'er reads all of the Wiki and still vigorously dismisses the possibility, it is frankly because they think the Bible said that the earth is motionless (which it
did not, imo) and want to adhere to a biblical earth.