You mentioned when you went full time. A person doing something full time says they don't have another job. This is their soul means of paying their bills. So you must make a certain amount from each event or you don't get the bills paid. So you have to have a minimum price you charge and also have the clients who will pay the amount you want. Also it has to be on a consistent basis.I used to look at it like the way you did... until I went full time and realized every date booked was crucial, especially during the busy seasons, and I had to maximize the income for each date I booked. So whether it was a wedding or small backyard party... that Friday or Saturday in June needs to generate on Avg $3500 or more.
Don't get me wrong, there are still instances that I'll discount... for example a 40th bday party that I did this past weekend came in only 3 or so weeks beforehand. I didn't discount primarily because of the work involved, I discounted moreso because of the last minute nature of the event and that it didn't affect any of my longterm dates which I need to book at a certain amount. The fact that it needed no prep work incentivized me to offer a more generous discount. Keep in mind though... a generous discount is reducing my starting price from $2750 to $2250 and offering like 30-50% off on enhancements.