As I said, it can be read several different ways, it's just my take on it.
It's not a "justification", it just shows there are no more serious issues involved- and she's pretty far down the chain trying to find reasoning for her own dissatisfaction in life.
He travels with her (but he keeps pointing out interesting vehicles), they watch movies together (even though it's a flick he's obviously not all that interested in, but finds something about it to keep him engaged- the cars); don't you think she should show comparable effort?
He's obviously led a full working life- he's ready to retire. This also means he's managed to save up an adequate nest egg, not spending excessively on frivolous or extravagant things that they can't afford. There's obviously priorities in their es that have been addressed and dealt with. Funny that she does not mention any contribution she has made, or if she even works or has worked- sounds like a woman who expects to be "kept" and catered to instead of being an active partner. Just speculation there, but her own statements seem to support it.
Well, they've been to "several counselors" together, but "get nowhere". She claims it's because he "denies his obsession", but counselors are well-versed in that- people with issues deny they have issues, that's why they are issues. More likely she's not liking what the counselors are telling her; so it's on to the next counselor, hoping to find the response she wants to hear. When that fails, her last chance at vindication is writing to Dear Abby.
All this can be is pure conjecture, coming from a one-sided viewpoint, and with far less than complete background information; so it can be nothing more than speculation. And it sounds suspiciously made-up.
And just so you know, I am happily married to a wonderful woman who doesn't tolerate any B.S. from me or herself. And as anyone who has also been on the other side of the fence will attest, we cherish every day of it.