Patriotism at work. Trump does all he can to insult Canada, and if people who govern Canada would allow it, they'd be seen as weak leaders. What they need is to work towards cutting any dependency on USA while defending their country worth.
Also, Trump rules only thanks to his show. Getting bitchslapped like that does hurt him. ^^
Efficiency, which these machines probably will not achieve in our lifetimes. When you can simply produce another worker, stuff can be done quicker and safer.