I think that some magicians do over-egg the performance of card magic. Not every trick "effect" needs a rationale, but I think the "moves" and "actions" do. If that doesn't make sense, I can amplify if you wish...or care!
I like the nuts & bolts - here it is folks - approach. Rovi, Harry Lorayne, Jerry Sadowitz, Aldo Colombini...and, dare I say it, me! (See http://www.paulgordon.net/promovideo.html
to see how I work.)
I don't like the magicians who try and make card magic appear as some heaven-sent high-art form. I think us card magicians do card "tricks" and as long as our techniques are good - we really are "selling" our personas. The complete package. In other words, how many so-called technical genius's have you seen that simply bore the pants off you? A lot, I bet! Conversely, there are too many "sloppy" card handlers who think their humour overcomes. Methinknot.