"Show, don't tell" as a principle often makes sense but it seems to have been elevated to a dogma nowadays.
I agree with La Panda du Mal. People who give writing advice can get carried away sometimes and turn something that is
usually good advice into an iron-clad rule to be applied at all times. It's ridiculous how rigid some people can be about things like show-don't-tell, or cutting out all adverbs. (Adverbs exist for a reason. If they were really so awful, would they not have fallen out of use altogether?)
Speaking as an editor, when I am critiquing a manuscript and tell a writer "show, don't tell," I mean "right here, in this scene, on this page, in this paragraph, it would be better to show rather than to tell." Perhaps I might tell them, "you have a tendency to tell things that you would be better off showing." But it is
never an outright proscription.
As others here have said, it depends on the context: How addicted is the writer to adverbs? Is this a point in the story where it's necessary to pick up the pace and move the action forward by stating things more succinctly, rather than describing a character's emotional state in detail (which, if carried to excess could result in the purplest of prose)? And so forth.
You could tie yourself into knots if you try to follow these "rules" too slavishly. There is only one genuine rule of good writing, "If it works, it works. If it doesn't work, find out why and fix it." The rules can be useful at the stage of finding out why something isn't working.