Cab, I'm wondering the same thing, what does it hurt?
1. I know there's some different opinions (maybe it's been verified) as to whether there is wood anywhere in the hull. If there is, that would be bad to have it constantly wet down there.

2. The extra weight (I trailer mine). Don't know how much water is down there, but the space is about 5 inches deep, 4+ feet long, and 4 or so feet wide. Granted, it tapers based on the hull shape, but still a significant amount of water.

3. The floatation foam is useless when saturated.

4. It stinks in both senses of the word (smells and it just shouldn't be there).

5. A constantly saturated state has to be doing some long-term damage to the hull/locker floor, stringers, etc. in addition to mold growth. May not hurt anything in 3-5 years, but what about 10 years? How much is the life of the components, and the whole boat, shortened because of this?

6. On principle, it just shouldn't be there (or there should be a deliberately-designed way to get it out). I appreciate a value-priced boat without some bells & whistles, but it should be structurally sound. What good is a lower price if core quality is compromised? And just in case other brands have experienced this issue, I don't care about other brands. If I hit a deer with my car, and someone else says "it's OK, it's happened to me", it really doesn't make me feel any better....