I think you are reading too much into the term "bullshit".

Now, granted the word can take on different levels of intensity depending on the circumstances in which it is used.

But it can and is used in general conversation and in that context it means nothing more than "I don't agree with you".

At least that is how the term bullshit is used here in Australia.

I am also Australian. :)

For what it's worth, I think most of the commentors are reading far too much into "this is an eye-bleeding script*.

I've seen people hurt by having what they've said called 'bullshit' by someone they respect; it's capable of emotional harm as well. That being said, let's not walk on eggshells.

One way to see if words are synonyms is to apply them to compound terms. In this case, "bullshit artist" is something that "rubbish artist" isn't.