"the Itchin' " refers to the itchy job of grinding out old fiberglass to make way for new. I think the suggestion is that you likely are facing more than just a complete deck replacement.
Generally, by the time you find soft spots on the deck, the structural components underneath (stringers, bulkheads and transom core) already show substantial rot. (That's what folks here mean when they say "boats rot from the keel up.") The chances are that when you core sample your stringers (the structural members that run under your deck along the length of the boat) and your transom core you will find some wet and/or rotten wood. In 2000, many boat makers still were using wood encapsulated with fiberglass for those components, and very often water that finds its way below decks or into the bilge will saturate the wood, which eventually rots.
You may be one among the very lucky few who has soft spots in the deck without any problems below, but if so, you are in the extreme minority. More typically, people look further and find much of structure below has been compromised and needs to be replaced.
It's pretty easy to check your boat for rot. Get a 1/4" drill and drill some holes sideways into your stringers near the bottom (try not to drill through the hull!). You can normally reach them easily through ski lockers or by the gas tank (if your boat has a removable panel to get at the tank). The motor mounts are also normally attached to (or part of) the stringers, and you should check them in the same manner. To check your transom, drill (from the inside) only 1" deep or so, at various places near the bottom and around the keyhole and an other thru-hull fittings. On some boats, you may have to remove carpeted panels behind the engine/storage areas to actually see the inside of the transom.
If your shavings are light and dry, you are good. If they are wet and/or dark, you have problems. After checking, you can fill the holes with a marine sealant like 3M 5200.
No on here hope your boat has rot, but we've all read too many stories that start like yours and end with a total restoration.
Let us know what you find.