From Buddhas point of view, is what is common called preaching unskillful not benefical?

Food for thought: It's in modern or western world common regarded and even broadly taught that such as preaching, in more dhammic words, giving [a sermon](https://en.m.wikipedia.org/wiki/Sermon) , is unskillful, not the way Dhamma is taught. Now my person like to ask if that actually is really true? - Is preaching to be regarded as the wrong way? - If not generally, where would be the point that preaching, teaching, giving a sermon might turn out to be not of use (either for giver nor for receiver)? - What might be a possible "psychological" reason, or cultural reason for aversion in regard of sermons? - Under which circumstances a possible gift turns out to *be* a kind of red flag? *[Note: This is a gift of Dhamma, not meant for commercial purpose or other low wordily gain by means of trade and exchange]*