Madam Speaker, obviously, judgment is a key part of any role in the House, and the judgment in this case, when one is Speaker, has to be to say, “No, I will not go to a partisan event; my role does not allow for that.” In fact, in the past, Speakers have left their party and sat as independent members when they became Speaker. That is a choice the current Speaker has to make in judgment, and he showed that his judgment errs on the side of partisanship, not on the side of being neutral. That is why he has to vacate the chair.
In the House of Commons on May 28th, 2024. See this statement in context.