I wouldn't say that's the case. Doug Ford got huge push-back for using it, to the point he repealed a piece of legislation that invoked it. Similarly, I don't think Poilievre would experience "no real consequences".
Plus, as pointed out in the article, "The clause can only override certain sections of the charter." IANAL, but I'm sure this (and Poilievre's other proposals to invoke the clause) will be reviewed by the courts.
I think Poilievre is also preying on people not understanding how our judicial system works. When someone is "eligible for Parole after 25 years" the key word is eligible. Our most heinous criminals will die in prison, but at a certain point, they have to right to go before the parole board, and I think that's a good thing.