In this question I was told that it is incorrect to make edits to math mistakes, and instead inform the OP of such mistakes. However, this doesn't make much sense to me. When the equation or expression in question is not the topic of the question and instead an example, commenting about it seems tangential to the topic at hand, and perhaps even impolite as it would come off as taking away from the topic at hand just to nitpick little details. It seems more prudent to just be proactive and make the edits yourself.
In general if the correction doesn't change the meaning or intent of the question, it's not worth discussing in the comments.
So is it generally considered bad practice to make small mathematical corrections to posts when said corrections don't change the original meaning or intent?