Honestly, I was more offended by the use of the word "mistake" in the political apology than by his taking of a vacation during lockdown. He didn't break the law by doing so, and he'd had to have gone into quarantine, as per border policy.
It was all about optics. He (or they) made the government look bad. But that's a matter of perception, which means it's relative to Canadian sanctimony.
We Canadians believe we're squeaky clean, so we fire folks for the smallest of infractions if our national moralistic image is at stake. There's hypocrisy in the larger population too, because we're part of the much worse problem of consumerism. Having a more moral or "socialistic" government than the current American one isn't saying much, because of how far the Americans have fallen.