How is that unscientific though? We need to create definitions and classifications, and it makes more sense to create that definition in the simplest place possible. IE: it's simpler to consider Pluto a dwarf planet along with many, many other dwarf planets, than create a new solar-system model that has 50 more actual planets.

And lets say that we went with the 50+ planet solar-system model... what would be the delineation point there? What standard should we use to preserve that number 50? What if we find 50 more small bodies in the coming years? Where does it end?

The reclassification of Pluto made more sense than just saying we don't have a clearly defined solar system. Planetary science requires the terminology so we can say what we're looking at. Planets? Dwarf planets? Trojans? trans-neptunian objects? There is a LOT of stuff out there, we can't call it ALL planets. So where would you have drawn the line that makes it "more scientific?"