I highly doubt it would have changed anything. Nobody says "I would have voted for Poilievre, if only he went on Joe Rogan!". Well, maybe Viva Frei is delulu enough to say that unironically.
If somebody is retarded enough to vote Liberals after the 10 years of controlled demolition of this country, there's nothing PP can say to change their mind. Not on Rogan, not anywhere.
Rogan is loosely allied with Trump (not criticizing him for that). Trump said he prefers Carney. I can't really blame PP for not walking to a possible trap with very little potential reward.