This is always the idea that people bring up but it's pretty obvious it wouldn't work.
Frodo and Sam and Gollum are able to sneak in on the ground. If they were flying in on an Eagle it would be obvious and easily spotted and instead of sneaking into Mt Doom you'd be having a battle on the steps of Mt Doom with only the eagles + whomever they could carry vs. all the forces of Mordor.
Anyone who brings this up as a serious flaw in LotR is being silly. The novel has flaws (and yes all 6 books are one novel) but failing to use the eagles is not one of them.
He brings up the idea that they'd be spotted and doesn't have a good response to it, he's basically just dismissive of it. "Oh well Sauron wouldn't be able to react in time." Ridiculous.
Frodo and Sam and Gollum are able to sneak in on the ground. If they were flying in on an Eagle it would be obvious and easily spotted and instead of sneaking into Mt Doom you'd be having a battle on the steps of Mt Doom with only the eagles + whomever they could carry vs. all the forces of Mordor.
Anyone who brings this up as a serious flaw in LotR is being silly. The novel has flaws (and yes all 6 books are one novel) but failing to use the eagles is not one of them.