"Guillermo" wrote in message
...

Why?


Because the rules don't allow it.



you could be doing fight following and he can recommend a heading for
traffic avoidance. Are they not allowed to do that?


Yes, headings can be suggested.



Also, if you want to transition the class bravo, they may give you a
heading before you enter the class B so they place you somewhere where you
can
transition the class bravo airspace safely. If I am coming heading towards
the approach end of a runway, they may want to vector me out towards the
center of the airport before I enter the class B.


Yes, they can require you to enter Class B airspace at a specific point, and
they can suggest headings to help you to do that.