Because they sound like one. And no one likes to be "pitched". Should you be prepared with a 7-9 second response, in case you are in an elevator or event and asked what you do? Of course. However, too many people sound canned when they give their over-rehearsed, prepared pitch as taught by so-called pitch coaches.
In music, perfect pitch is rare. So it is with business. The better alternative; be conversational! You'll sound unscripted, natural and confident. Plan what you are going to say so that you are never left stammering. But practice it as though you were telling your best friend over a "beverage" until rolls natually and "tripingly" off your tongue.
The canned pitches...well, they ought to be pitched. They are so last season.
