Harry Potter and the Deathly Hallows [Part 2]

*Diagon Alley is a cobbled wizarding straat and shopping area located in London behind a pub called the Leaky Cauldron. Many of the set pieces were re-dressed and repurposed as Hogsmeade for Harry Potter and the Prisoner of Azkaban.

*To create the magical moment when Harry's wand chooses him in Ollivanders, filmmakers slowed the film speed, which is normally twenty-four frames per second, to one hundred and twenty frames per second.Remarkably, this dilation of time, some clever lighting, a smoke machine, and a fan were all they needed to produce this effect.

I recently found a strange contradiction in the concept of wizarding money.I'd like to know if my idea is true of if there is a counter-argument against it.

In pg.65 of HP and the Chamber of Secrets,we learn that Muggle money can be exchanged into wizarding money.

We also know that potentially valuable(in a Muggle point of view) objects such as chairs can be Conjured door magic(eg:Dumbledore does this in the courtroom in HP and The Order of the Phoenix).

So any wizard who knows basic Transfiguration can Conjure objects such as chairs,sell them to Muggles to obtain Muggle money and then exchange this money into Galleons,thus obtaining an infinite amount of wealth.

Doesn't this contradict the whole point of wizarding money?

Thanks in advance for any help.