That it's glaringly absurd. There's a mountain of evidence that points to a FAR older earth, with creationists spinning things any way possible to disbelieve it, despite any clear science/evidence/etc to back it up when evidence is presented. ie it's pointless to discuss the topic with them as they aren't about to listen. I imagine it's rather how discussions about the earth NOT being at the center of the solar system/universe went many years ago despite all evidence pointing to that (surprisingly, many creationists are OK with that.....).
First off, do you have any possible evidence/clues that little pink dragons DON'T live on Pluto? Well then it's reasonable to believe it! This is the logic you're presenting us.
Second, again, there is a ton of evidence of a much older earth. It's up to each individual whether to accept it or go "NANANA I CAN'T HEAR YOU" and pretend it's all some satanic fabrications.
Exhibit A.
Too bad then that Gen 1 is what we're talking about.
Yeah, actually, they are. One needn't know exactly (or even roughly) how old the Earth is to be saved. In fact, the idea is ridiculous.