I sort of understand what you're saying. I'm sure a picture is worth a 1000 words here. My concern was if leaking water (say from a ruptured line or sump) were to get to a height in the room that it migrated towards the stand, what would prevent it from getting into your living space. I will have carpet in the living space, so I certainly don't want water wicking into it. It's probably less of a concern for you because I recall that you went with the underlayment below the plywood for your subfloor... not to mention that you have a floor drain and your floor is pitched properly unlike my 70 yr old floor. I'd have to contain the water and shop vac it since I don't have a floor drain.