As it has been pointed out to you before nothing is “absolute & final”, so by your requirement nothing can be “right”. That the methotrexate I take interferes with the metabolism of folic acid is known and is not one of the desired effects in this consideration. It is then an adverse side effect and must be mitigated by increased intake of folic acid.
Actually someone having a complete lack of understanding about the subjects they are discussing and claiming things like “I prefer differently” is pretty routine on this forum. I can introduce you to some of them.
Nope, that we might perceive it a s flat on a very limited scale in no way makes claiming it is flat “more valid”.
What “common people” might “feel” is irrelevant to anything but what “common people” might “feel”.