I think you'd rather have good odds at some companies and 0% at others, rather than abysmal but non-zero odds at all companies.
And as an added bonus, you might get hired at a company where you're actually a good fit, rather than one you weasled your way into, and get to pay rent, food bills, and other expenses through employment for a long time!
"Wouldn't give a straight answer on question X" isn't an instant no-hire, but it's not a positive signal.
If you can accept that then you've learnt something.
Where was this coming from?
It was an internal candidate so it would be awkward to tell him to his face he was floundering.
He was an internal candidate, we were interviewing him to see if we could trust him with more responsibility (more X specifically), since the new role shouldn't cover up X when it happens. The role involved doing X for himself AND for other people.
Similar to the form of "tell me about your biggest weakness" and you responding with "I have no weakness".
I've been on the recieving end of clueless folk trying to make me feel small when I've just been looking for a job, so I might be a bit sensitive about it! Sorry for any offense given. Thankfully I'm beyond that craziness now and can just do what I want for work.