Debunked? Its a counterpoint to the fact that it’s pronounced that way because it’s spelled with a g. If that poor argument wasn’t used, the giraffe one wouldn’t have to come up. It’s not evidence of anything other than that letters can be pronounced in more than one way.
For the graphical thing, imagine pronouncing NASA wrong because of the way aeronautical is pronounce. Or underwater in scuba. World in WHO? The I in AIDS isn’t pronounced anything like immunodeficiency.