Just for starters, Canadian immigration is not a piece of cake. For example, thousands of applications for Permanent Residency that were not processed in the last ten years by 2011 (because of the department’s own issues) were tossed. This means that people who were waiting for 10 years to know if they could come to Canada or not didn’t get an answer for 10 years and then were told “sorry, we’re not going to fulfill the contractual obligation of processing your application for the fee you paid because we’re overwhelmed and understaffed”. Many became uneligible to apply to other programs in other countries because immigration made them wait for 10 years to not even give them a yes or a no.
A Canadian who marries a foreign spouse must wait over two years for their spouse to be a permanent resident. This means that, if your spouse is out of Canada, you must spent (at least) the first two years of your marriage living in a long distance relationship (what a way to consolidate the foundations of your marriage!) and if your spouse is in Canada, you must spend all that time supporting your family on your sole income, praying that your spouse doesn’t get sick and the bills bring you to bankruptcy, with fear of traveling abroad because your spouse might not be allowed back in and with the constant fear that you’re not really all settled in because the government has a say on who you can marry.
I don’t know why Lena Dunham or any other citizen of the United States would think they don’t have to pull up with all of this. I actually know about a Canadian married to a woman from Maine who had to go live abroad because Canada wouldn’t allow his wife to live with him and his family in his homeland.