Kev, you look like a reasonable person and I respect your opinions, so I will spend little my time answering you.
1.
The bullfighting is divided in four parts or times:
FIRST. fight with cape, in this first part the bullfighter fights to the such bull and as the animal it goes out to the arena.
SECOND. Pike and "banderillas". This part is the one that seems to be crueller (or in fact it is the cruellest). From an armoured horse the "picador" it goes in to the bull a lance with a small peak to diminish the force of the animal, and then the bullgighter´s helpers or bullfighter himself put on the "banderillas", which are a few small sticks with peak. this do not affect too much the bull, only they serve to anger it. Quite this bloody process is necessary to be able to realize the third part:
THIRD. The bullfighting with "muleta". The muleta is a cap smaller than the cape. This part is the most difficult dangerous and "artistic", where the bullfighter comes closer more to the bull and puts his life in more danger.
QUARTER. Death. This is very important. The bullfighter kills to the bull with the sword throwing himself between the animal´s
horns. In this point is when more bullfighters have died, dying they at the same time as the bull.
The wounds that happen to bull in the second part are not, in any way mortal, of fact the reprieved bulls are recovered without difficulty. The bull dies only for the sword that is the only weapon in arena that can hurt it of death.
2.
In this point you are mistaken. They do not enjoy the pain of the bull, enjoy the movements of the bullfighter, his skill, his elegance, his sobriety and the "mutual understanding" that the man can reach with the animal. It is very dificult to estimate all that since there is infinity of details that escape from the not expert observer , in this respect the bullfighting looks like the kabuki theatre and other oriental very elaborated arts.
In fact there is no personage more hated by the public that the horsebreaker, who fixes the lance in the bull hurting it, and there is no anything badly for the reputation of a bullfighter that not to manage to kill to the bull the first time, making it suffer.
3.
I did not want to say it. Only I wanted to say that a beautiful species as the brave bull is would become extinct if the bullfughts were not existing, since they are animal very expensive and difficult to support that it can not be profitable of any other way.
4.
I do not try to justify the bullfighting only because it is a tradition, but if I consider it to be notable from an aesthetic point of view and in certain artistic way. Hemingway said that the bullfighter was the only artist who was putting his life in danger.
About bullfight actual status:
The bullfighting crossed twenty years ago a stage of decadence, due to the death in the arena of the greatest bullgighter in that time and to the lack of young bullfighters that were replacing him, but in the last years a great summit is obvious in all the countries where it is practised. Today there is a bullfighters' great quantity young men who did not exist before.
About Bullfighters' deaths:
The death is a part of the bullfight. It is present in the death of the bull and in the possible death of the bullfighter. The bullfighter´ death is increasingly rare, though the bull hurts the bullfighter very often (even more frequently that years ago) producing to him wounds that a few years ago had been mortal, today, for the advances of the medicine and the better preparation of the bullrings, it do not provoke (normaly) the bullfighter´ death . Julian lópez "el Juli ", for example, with only twenty years old has the body full of enormous scars. This anyhow is a part of "fiesta" and the bullfighter accepts it as something of just person, because the bull dies in the arena too.