The advice is badly phrased, which is why following it literally makes your prose worse.
It is not a ban on telling. It is a note about where the reader's attention should do the work. Telling is efficient and you want it for anything that is not the point of the scene: transitions, background, time passing.
Showing costs words, so spend them where the emotion matters and the reader needs to arrive at it themselves rather than be informed of it.
A page of clenched jaws for a minor irritation is the same error as summarising the climax in one line. Both are a mismatch between the words spent and the weight of the moment.
If the note keeps coming back, it usually means the important beats are being summarised and the unimportant ones dramatised.