Our TV set is on the fritz, so rather than watching the fireworks last night we listened on the radio.
"There's a trail of yellow heading up into the sky. It descends into a parabola and now it's exploding into a cascade of yellow, green and red. Oh! Here's another one. Up up up, exploding into a blossom--a crysthanamum-like explosion. Look, there's another one."
That's fireworks on radio.
My point is simple. Different mediums have different strengths. If you, or your agency, can't use them all--if you're locked into one way, you'll produce crap. Like fireworks on the radio.