To qualify for best all-around, a player had to participate in 25 events, so everyone was exhausted by the end of the tournament. It's not good business not to. A lot of players have suggested that, more like the golf tournaments. The WSOP has gone in that direction, but the WSOP is so big that they can afford it. Most tourneys just don't have that large a field.
Bounties help spread the money around.
In a bounty event, you reach a compromise because the people who are playing along the way can get back part of their entry fees and have more money in their pockets to enter the next event. If you run a casino, the best thing you can do for your cardroom is to spread the money around and keep it in the regular players' pockets. A cardroom wants its tournaments to bring in customers. If players just come in, play the tourney, and then leave, the cardroom hasn't accomplished much. What they really want is to bring players into the room early to play in live games, keep them there in side-action games for as long as possible after the tournament, and instill in them the desire to return to the room.