Why is 'bitch' bleeped out?

The word is in the dictionary and in the western media people often use it openly (even in TV shows), there is no shame in using that word.
When I heard the song "Karma is a *#&$@" I thought maybe they were bleeping out the F word but I thought it doesnt make any sense, the term is Karma is a bitch.
No reason to bleep that word out, here is the dictionary on that word:

bitch   
[bich] Show IPA
–noun
1.
a female dog.
2.
a female of canines generally.
3.
Slang .
a.
a malicious, unpleasant, selfish person, especially a woman.
b.
a lewd woman.
4.
Slang .
a.
a complaint.
b.
anything difficult or unpleasant: The test was a bitch.
c.
anything memorable, especially something exceptionally good: That last big party he threw was a real bitch.
–verb (used without object)
5.
Slang . to complain; gripe: They bitched about the service, then about the bill.
–verb (used with object)
6.
Slang . to spoil; bungle (sometimes followed by up ): He bitched the job completely. you really bitched up this math problem.