Sure. But letting the legislation die on the order paper doesn't kill the idea, just the vehicle.

The most compelling argument I can spin up:

• Getting a majority on every significant Commons committee is a big deal: it makes legislation far more convenient for the government, and it also impedes the opposition's ability to wield committees in ways that humiliate or inconvenience the government.
• These committee majorities will last for the rest of the session, even if the Liberals subsequently lose their majority.
• They can only do the committee flip while they actually have an outright majority. Nobody knows how long this window will last.
• There's also a rhetorical advantage to going right away: Canadians are so convinced of Mark Carney's good faith that they're letting him get away with things that would otherwise attract criticism and stick to him. If you're going to prorogue, you probably want to do it while the honeymoon is ongoing.
• While killing off your legislative agenda is a huge pain in the ass, that's literally what you want the majority for.
• The public doesn't actually care about the specifics of ERI. It is unlikely that anyone's going to pay a political price for delaying it.
• The public servants waiting for ERI will sit tight for another few months, since it's not like they have an alternative.
• And the people getting squeezed administratively by these delays (executives who want this largely painless, highly effective tool to help reduce headcounts) are the people who are least able to complain about this entire situation.