The advantages of unionization are obvious, so why don’t more workers join unions?

It’s well established that unionized workers earn better wages and have better benefits than their non-union counterparts. Unionized workers also experienced much greater levels of job security during the COVID-19 pandemic. But if the advantages of union membership are so obvious, why are fewer than one in three workers in Canada unionized?

https://theconversation.com/the-advantages-of-unionization-are-obvious-so-why-dont-more-workers-join-unions-164475