Before getting into lobbying, I was a programmer - I loved programming and it kept me happily employed. If the issues of freedom and the need for lobbyists didn't present itself, I probably would have stayed a programmer.
So rather than being a member of the lobbyist community that's being diverted from one good cause to another, I think I'm a member of the software community, diverted from one department to another.
I'm only one example, but it makes the point that I don't think we can assume that having lobbyists for software freedom is detracting from other areas.