What does the Assassin's Creed Brotherhood hire thieves for? And mercenaries and prostitutes

Prostitutes can attract the enemy's attention, mercenaries can be hired to help fight, and thieves can hit the enemy and let the enemy chase the thief. (Usually used to sneak into the restricted area) But I seldom use it. I like to use the assassin's younger brother to help fight, which is much better than them (I will hire a prostitute occasionally). ) In fact, I just want to see the jokes of these pervert soldiers. Moreover, I love to kill the last person, and after being found, I have a big fight with the soldiers. Of course, it is limited to the time when there are no assassins, so thieves, mercenaries and prostitutes are all useless. After the recruitment task, the assassin's younger brother can completely replace them. (It's not a substitute. These functions are all useless. Because no one usually takes care of XXX without being discovered, prostitutes and thieves are abolished. As for the mercenary, the assassin's younger brother can completely replace it, which is better than the mercenary, because if the assassin's younger brother is not noticed, he can carry out immediate assassination (assassination at once) or a similar leap of faith (that is, jumping off the straw pile or river with a "ah" in a place where there are birds) and the assassin's younger brother has many functions, which are much better than the first three)