They’ve just performatively asked truckers to leave, so that they can always point to that later in their election campaign. Why would they want them to leave?they don’t.
This is a wedge issue, and as such they're casting their votes to alienate a huge (likely majority) of voters away from your platform before the leader has even been selected.
Secondly, this protest has been a huge news vacuum attracting non-stop coverage. This is bad for a party that needs to drum up any support for a leadership race to carry them more seats in the next election. By the time this plays out, the conservatives could be half way through their election and most Canadians may not even know the candidates.
Plus, politicians who do vote against their constituents' wishes can run in a district that's more friendly to that vote.