Their “plans” as a collective party don’t really matter in the eyes of some younger voters. Instead, what they see, hear and read from individual candidates is what forms their idea of what direction the party is likely to (try and) take the nation.
If a candidate is openly vocal in a multitude of private and public settings about topics they view as rights and/or privileges for all CDN citizens, and their respective party seemingly supports/upholds their viewpoints without question or condemnation of any kind, then those same voters are essentially automatically going to assume that the party as a whole will be directly in line with the opinions expressed. (And, btw, the same goes for the Liberals et. al.)
Ultimately, many young voters (and some old voters too) aren’t interested in doing thorough and lengthy research on their own. They will form their opinions based solely on the most easily accessible excerpts of information flashed in front of them. And unfortunately, when candidates choose to blur the lines between their personal beliefs vs their party’s ideology and what is in the best interests of all Canadians, then everyone loses.