Are they unable to afford a dictionary so when they are in doubt about what a curse word is/is not they can look it up? Now if you call someone a bit** you are saying that person is malicious/unpleasant/selfish. None of those are curse words. If you say something was a bit** to accomplish you are saying it was very tough/difficult/hard to do. None of those are curse words. Some folks even use it to mean "memorably good" as in "that party he threw was a bit**". Or "your dress is bit**in!" It can also mean to bungle, screw up as in "he bit**ed the job completely". Wherever did anyone think the word is on a par with real CURSE words?
1: the female of the dog or some other carnivorous mammals
2 a often offensive: a malicious, spiteful, or overbearing woman —sometimes used as a generalized term of abuse
b often offensive: a lewd or immoral woman
3: often offensive: something that is extremely difficult, objectionable, or unpleasant
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Unless someone is speaking literally of a female dog.....yes it is cursing. It may or may not be as bad as other curse words but it is a curse word regardless.