McCabe and the 25th Amendment: Two Puzzles

According to news stories based on statements by Andrew McCabe, he tried to arrange to remove Trump via the 25th Amendment. This raises two puzzles:1. Under the 25th Amendment, the VP plus a majority of the cabinet can temporarily suspend the power of the President. But the next step is for the President to inform both houses of Congress that he is able to function. He then gets back into power unless both houses vote against it by a two-thirds majorityIf two thirds of both houses wanted to get rid of Trump they wouldn't need to use the 25th Amendment, they could just impeach and convict. McCabe's tactic only makes sense if he hadn't read part 4 of the amendment the tactic was based on, which seems unlikely. Am I missing something?2. "You know those paranoid ideas Trump had that the Deep State was out to get him? Well, we were." That's what the story comes down to. It's hard to see how that doesn't help Trump—which, on McCabe's account, is just what he shouldn't want to do. So why did he tell it? The least implausible answer I can come up with is that he wanted to sell his book—even if doing so resulted in four more years of Trump. Comments welcome.