Yes you will need only 1 goal for both of it to win, bolded the part to make it clearer. You mentioned that it is unnecessary to list it but indeed it is necessary to list it because the odds will be different depending on what you choose.
Comparing it to over 1 goal selection, then it is quite safe to bet on over 0.75 goal so it is necessary to list it as well as some people might choose it
Directbet is the only site I see listing bets like +0.5 or +0.75 at different odds. So if A vs B , and you were to bet on A + 0.75 , then if that wins, then so does the +0.5 , even though +0.75 will have less odds in this case. I haven't ever seen sites other than DB actually offering it.