But because expert A holds the same view as you is no proof of your argument but it is an illustration of one view-point. Use of Analogy i.e. Reasoning from one set of circumstances or characteristics to another set that is or seems similar. Thus, the motor car in some ways is like the human body. There is no mention of an equivalent to government intervention in the pond. There are no social institutions in the natural world.
Animals act by instinct.
Check out analogous comparisons by splitting them into their component parts and checking them for weaknesses. Advertising is an important bulwark of democracy, and it should not be interfered with. The argument suggests that for both purposes unrestricted advertising is necessary. If X and Y are both bad, both should be dealt with. If both X and Y are good, then both should be encouraged.