When there is no “deep” end, there is more “usable” space; the entire pool can be shallow and there for all of it can be utilized at all times. Of course, then there is no diving and for some people that is desired or requested. It is easy to tell users or guests that “no diving is allowed – anywhere”. Having the whole pool “shallow” will allow the users to maximize the play area. So, a smaller pool can still have a very large play area when the entire pool is shallow.