I think that if you do some reading on this site you will find out that the people that are really serious about LONG RANGE hunting and shooting will dial for each shot a majority of the time. Some will also use graduated reticles but they do so with knowledge of current conditions and have charts that give them the needed data.
You can use a BDC but it is only really good for one set of conditions. It is a compromise at best and a useless add on for most when the ranges get past 500-600 yards. Various weather, temp, BP, wind etc. will make you glad you can dial instead of relying on a BDC that is only good for one set of conditions. If you are going to keep your shots fairly short then you could get by with a BDC. They are available from several different sources.
Nothing like knowing how to call a shot using data and dialing it in. If your relying on BDC and holdover in varying weather, conditions, and locations you need not shoot very far, because your hitting an area and not a SPOT.