He's the Canadian crew member for Artemis 2, which could be just 25 days away.

I can't personally remember any occasion when an active astronaut was this blunt, except a few months ago where he said the same kind of thing to a room full of children! (At some point during this IIRC.)

I'm guessing these kinds of risks are foremost on his mind. (Here's a critic's summary of much of the criticism of Orion. Haven't read it myself, just heard the writer discuss some of it on a podcast.)