Earlier quoted context omitted.
Because it’s not true. It’s a falsehood perpetuated by people who seek to delegitimize the status quo. You pay people to make PowerPoint presentations about the proposed legislation. (And create talking points and white papers and that sort of thing. A lot of it is just arming legislators with data and arguments to support positions they support anyway.)
In many cases you're paying people to create the text of the laws themselves. Also, how is "paying people to make PowerPoint presentations and talking points about proposed legislation so that legislators can be convinced that a certain law should be passed" not just a form of "paying to pass a certain law"? When I set out to write complex software, I generally collect data, make arguments, write design docs / white…
Also, I have always found the blaming of lobbyists odd: I am confused by the blaming of lobbyists for presenting their agenda to a legislator, who then promotes that agenda, leading to the passing of a law that is pro-that-agenda. I would place all the blame on the legislators. It’s like, if I approach my boss and ask for excessive raises over and over, and wine and dine her, and then I keep getting those raises, should my co-workers be far more mad at me or my boss? It seems to me it is my boss’s fault for giving the raise, as she holds all the real power, not my fault for asking. She has the duty to decline if the request is improper. I do not believe I have a duty to not make my case, despite probably being scummy. What I am doing may be frowned upon, but if my boss is swayed by a few compliments and a donation to her charity of choice, she probably should not be the boss. The same goes for legislators - stop voting for the dummies with no scruples, and stop thinking it is the fault of anyone other than the people who actually vote for these hypothetical bills that result in so many one-sided, pro one-company-or-religion-or-whateveror, awful laws.
I personally feel lobbyists are scummy, but I fail to see them as blameworthy in regards to the laws we actually end up with.