I think the reason Pierre chose not the lead is because he knows his own limits. He already said he is not willing to sacrifice more time away from his family.

Pierre is a good Vanguard, he's solely focused on attacking the Liberals head-on in the front-lines. But that doesn't mean he has a good overall plan for everything. If we look at the last few months, Pierre has mainly focused on the WE Scandal and Liberal spending. He hasn't really talked about how we should deal with China or anything else.