Well this is the first site I experience this, but I've seen it quite often.
People actively making wrong calculations and when explained the modifications are "denied". Often by users with quite high reputation themselves.
An example is this topic here. While the answer came to the correct conclusion it was being based on wrong assumptions and showing too much shortcutted equations in the form of an image.
I've tried to explain it in the comments, as the conclusion (smaller stability margin for center of gravity) is correct. However in the comments the explanation was attacked. When I went into the details (which are a question + answer of itself), the details were just ignored and the original statement was reiterated.
So should we do something about these "circle" reasons? I like explaining things with a mathematical rigorous proof, however I don't like having to work through reasoning without explanation.
This question is also not the first I've seen where formal equations are grossly abused to no longer be correct just to shortcut to an answer that is actually correct. But for the wrong reasons. I keep stumbling upon such answers, often accepted for a long time already.
Another example is this answer. Here a highly reputable poster actually calls us researches almost literary "liars who retrofit the truth to fit what they wish to see". I'm not even sure what I can even do there in comments, I can show papers, but the answerer has denied those. I can show calculations - but the answerer has said he has seen those. The answerer has not come up with any actual reasoning, other than below-belly reasoning without calculations.
Yet that answer is highly upvoted, accepted and underlined by a highly reputable person here.