Yes, but this is the "consider my population unchangeable" case I mentioned, wherein "average" and "total" cease being distinct. Certainly if we calculate average utility by summing 1 won-at-roulette future with 37 killed-myself futures and dividing by 38, then we get a lousy result, but it (as well as the result of any other hypothetical future plans) is isomorphic to what we'd have gotten if we'd obtained total utility by summing those futures and then not dividing. To distinguish average utility from total utility we have to be able to make plans which affect the denominator of that average.